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Aquarium Alarm Auto Top Up Kit | Fish Tank Auto Refill Pump | Fish Tank Alarm

Auto Top Up Kit with Level Alarm

£129

Auto Refill
LED Alarm
One Key Drain
Optical Sensor

Price: £129

Delivery time: 5-7 days after a 24-48 hour handling time
Free UK delivery on orders £75+, otherwise a flat £25
Pay by card or PayPal, handled by the payment provider
14 days to change your mind, plus your statutory rights

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Product specifications

Line length	177.8cm \| 70in
Package Weight	0.56 kg \| 1.23 pounds
Included	DC: 12V 5W
Also	H.max: 2M \| 6.5FT
Also	Q.max: 74 GPH
Also	Package Dimensions ‏ : ‎ 20.2 x 13.3 x 9 cm \| 7.95 x 5.24 x 3.54 inches
Weight	0.56 kg

Shipping & returns

Tracked delivery anywhere in the United Kingdom. It is free on orders of £75 or more, and a flat £25 below that. Allow 5 to 7 days, after a 24 to 48 hour handling time.

Under the Consumer Rights Act 2022 you have 14 days from delivery to cancel for any reason, and a further 14 days to send it back in resaleable condition. We refund the price you paid, including standard delivery. You cover the cost of returning it unless the item is faulty.

If it arrives faulty, damaged or not as described, we put it right at no cost to you under the Consumer Rights Act 2022 and the EU Sale of Goods Directive 2019/771, return postage included.

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Looking after it

Wipe the sensor prism at every water change. Keep the reservoir covered so nothing falls into it.

Auto RefillReplaces evaporated water automatically

LED AlarmTells you when the level is wrong

One Key DrainSecond function on the same pump

Optical SensorPrism design that stays readable

About this product

Refills the evaporation and tells you when it cannot.

A 12V 5W auto top up pump with an optical level sensor, an LED alarm and a one key drain function, on a 177.8 cm line.

Double application aquarium alarm for auto refill & one key drain water

Easy to install and use, no complicated programs

Our product uses an ultra-wide prism, and point C will always be kept clean. When the point below B is covered with impurities for a long time, the monitoring fails and overflows, but C is not affected, and an alarm will sound.

When the water level line is near A (the first monitoring probe), the product will automatically refill water; When the water level reaches B (the second monitoring probe), the automatic refill will be suspended.

New security technology, two optical sensors monitor the water levels, double protection, can attract your attention quickly. When it occurs below situations, it will make a loud beeping noise to warn you: ① The water pump that placed in the bucket is out of water. ②Water pump's electric wire loose. ③External sensor is out of water. ④Fish tank water level is higher than the auto top off monitor pump.

Led Indicators Alarm. The red light is constant brightness, which means it is working normally, off is not ok. If other lights flash, it indicates that there is an issue with the device, which needs to be checked and corrected with reference to the manual. YELLOW LIGHT: water pump drain water; BLUE LIGHT: water pump refill water; GREEN LIGHT: external optical sensor; RED LIGHT: power adapter.

Simple And Easy To Use. Easy to install and use, no complicated programs. Connect water pump, external sensor and power supply to monitor and it’s ready to run. Suitable for saltwater and freshwater tanks (up to 227 Litre). Can be installed in a cabinet filter or directly on the aquarium edge. Because of monitoring, no longer have to worry about the lack of water in the spare water tank placed in a hidden location.

2-In-1 Application. Auto refill and one-key drain water. Put the water pump in the fish tank, and plug the water pump cord into the upper (Yellow light hole) to drain water. On the contrary, put the water pump into the reserve water tank and plug in Blue light hole for auto refill water, and plug in external optical sensor to avoid water shortage in the reserve water. “M” button, PAUSE/CHANGE WORKING MODE.

Still deciding?

Not sure yet? That is fine.

You can change your mind. Under the Consumer Contracts Regulations 2013 you have 14 days from delivery to cancel for any reason, and a further 14 days to send it back in resaleable condition. We refund the price you paid, including standard delivery. No product here is cut, built or configured to a customer's measurement, so that right applies to everything on this site.

If it turns up faulty, damaged or not as described, that is on us. The Consumer Rights Act 2015 covers you, we pay the return postage, and you can have a repair, a replacement or your money back. Read the full detail on our refunds and returns page, or ask us anything before you order.

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Got questions?

Frequently Asked Questions

Does an Aquarium Alarm Auto Top Up Kit help with maintaining water chemistry?

Yes, an Aquarium Alarm Auto Top Up Kit helps maintain water chemistry by ensuring that the water level remains consistent. This prevents fluctuations that can alter salinity, pH, or other critical parameters for your aquarium’s inhabitants.

Is a Fish Tank Auto Refill Pump easy to install?

Yes, a Fish Tank Auto Refill Pump is simple to install. It typically requires minimal setup and can be easily connected to a water reservoir, offering quick automation for maintaining consistent water levels.

Can an Aquarium Alarm Auto Top Up Kit be used in planted tanks?

Yes, an Aquarium Alarm Auto Top Up Kit is perfect for planted tanks. It helps maintain the water level and humidity, ensuring that your plants and fish thrive in a consistent, stable environment.

How does a Fish Tank Alarm detect water level changes?

A Fish Tank Alarm uses sensors to monitor the water level and will alert you if it falls too low or rises too high. This ensures you are immediately notified of any irregularities that could affect the health of your tank.

Can a Fish Tank Auto Refill Pump be used for freshwater aquariums?

Yes, a Fish Tank Auto Refill Pump works equally well for freshwater aquariums. It ensures that the water level remains stable by automatically adding fresh water, preventing issues caused by evaporation.

Does an Aquarium Alarm Auto Top Up Kit help reduce maintenance?

Yes, an Aquarium Alarm Auto Top Up Kit reduces maintenance by automatically replenishing water levels. It takes care of one aspect of tank upkeep, allowing you more time to focus on other tasks, such as cleaning and feeding.

Is a Fish Tank Alarm suitable for marine aquariums?

Absolutely. A Fish Tank Alarm is perfect for marine aquariums, where maintaining stable water levels is crucial. It ensures that fluctuations due to evaporation or other issues are promptly detected and managed.

How does an Aquarium Alarm Auto Top Up Kit prevent tank imbalances?

An Aquarium Alarm Auto Top Up Kit ensures that water levels are consistently maintained, preventing any imbalances caused by evaporation. This stabilises the salinity, pH, and temperature, essential for a healthy aquarium ecosystem.

Can a Fish Tank Alarm help with maintaining proper salinity?

Yes, a Fish Tank Alarm can help with maintaining proper salinity in saltwater tanks by ensuring that water levels are kept consistent, preventing salinity imbalances caused by evaporation or overflow.

How does a Fish Tank Auto Refill Pump help with tank aesthetics?

A Fish Tank Auto Refill Pump helps maintain the tank’s appearance by preventing water level fluctuations. With consistent levels, the water stays clear, and the visual appearance of the tank remains appealing.

Can an Aquarium Alarm Auto Top Up Kit be installed with a filtration system?

Yes, an Aquarium Alarm Auto Top Up Kit can be installed alongside filtration systems. It will top up the water while your filter system runs, ensuring that your tank’s water level remains consistent for optimal filtration performance.

Does a Fish Tank Alarm work with any water reservoir?

Yes, a Fish Tank Alarm works with any compatible water reservoir that is connected to your tank. Whether you use a freshwater source, a dechlorinated water tank, or a tap connection, the alarm will function properly.

Can a Fish Tank Auto Refill Pump help with evaporation in open tanks?

Yes, a Fish Tank Auto Refill Pump is especially useful in open or uncovered tanks where evaporation is a constant issue. It automatically adds water as needed to counteract evaporation and keep the water level stable.

Is an Aquarium Alarm Auto Top Up Kit safe to leave running overnight?

Yes, an Aquarium Alarm Auto Top Up Kit is safe to leave running overnight. It is designed to work 24/7, maintaining water levels consistently without posing any risk to your aquarium’s health or the surrounding area.

How can a Fish Tank Alarm help me save water?

A Fish Tank Alarm helps save water by alerting you if the water level rises or falls beyond set parameters. This can prevent wasteful overflow or unnecessary topping up, ensuring you only use the water you need.

Does a Fish Tank Auto Refill Pump use a lot of electricity?

No, a Fish Tank Auto Refill Pump is designed to be energy-efficient, using minimal power while operating continuously to maintain water levels. It is a cost-effective solution for keeping your aquarium in top condition.

Is an Aquarium Alarm Auto Top Up Kit compatible with all aquariums?

Yes, an Aquarium Alarm Auto Top Up Kit is compatible with most aquariums. It works with various tank setups, whether for freshwater, saltwater, or reef tanks, as long as the required space and water source are available.

How does a Fish Tank Auto Refill Pump contribute to tank stability?

A Fish Tank Auto Refill Pump helps ensure that the water level stays stable, preventing issues caused by fluctuations. This stability is key for maintaining optimal conditions for fish, plants, and invertebrates.

Does an Aquarium Alarm Auto Top Up Kit affect water temperature?

An Aquarium Alarm Auto Top Up Kit doesn't affect water temperature directly. However, by preventing evaporation, it helps maintain consistent temperature levels, which is important for keeping your aquarium’s environment stable.

Is a Fish Tank Auto Refill Pump helpful for large aquariums?

Yes, a Fish Tank Auto Refill Pump is particularly beneficial for large aquariums where maintaining water levels can be time-consuming. It ensures consistent water levels, even for larger setups with higher evaporation rates.

How does an Aquarium Alarm Auto Top Up Kit save time on maintenance?

An Aquarium Alarm Auto Top Up Kit saves time by automating the process of topping up water levels. It removes the need for frequent manual refilling, allowing you to focus on other aspects of aquarium care.

Can a Fish Tank Alarm be integrated with other aquarium equipment?

Yes, a Fish Tank Alarm can often be integrated with other equipment, such as filtration or temperature control systems. Many models feature smart functionality, allowing you to monitor and manage your aquarium through apps or centralised controls.

Does a Fish Tank Auto Refill Pump require a water source?

Yes, a Fish Tank Auto Refill Pump needs a connected water source, such as a reservoir or tap. The pump automatically replenishes your tank by drawing from the water source when the level drops, ensuring your tank stays filled.

Is an Aquarium Alarm Auto Top Up Kit suitable for saltwater tanks?

Absolutely. An Aquarium Alarm Auto Top Up Kit is ideal for both freshwater and saltwater tanks. It helps maintain water levels in marine aquariums, preventing fluctuations that could affect the salinity or water quality.

Can a Fish Tank Alarm prevent overflow issues?

Yes, a Fish Tank Alarm alerts you if the water level rises too high, helping you prevent overflow. It ensures that your tank doesn’t exceed its capacity, preventing potential messes or equipment damage.

How does a Fish Tank Auto Refill Pump help with water quality?

A Fish Tank Auto Refill Pump helps maintain the water level and ensures that evaporation does not concentrate harmful chemicals in the tank. By constantly maintaining a healthy water level, it contributes to stable water conditions.

Is an Aquarium Alarm Auto Top Up Kit easy to install?

Yes, an Aquarium Alarm Auto Top Up Kit is simple to install. It typically connects to a water reservoir and is easy to set up without requiring professional assistance, making it user-friendly for both beginners and experienced aquarium owners.

How does a Fish Tank Alarm work to protect my aquarium?

A Fish Tank Alarm alerts you if the water level drops too low or if there’s an issue with the filtration or pump system. It ensures your fish are safe by notifying you of any potential issues before they become critical.

Can a Fish Tank Auto Refill Pump prevent water evaporation problems?

Yes, a Fish Tank Auto Refill Pump automatically detects low water levels and refills your tank. This prevents evaporation from negatively affecting water quality, keeping your fish happy and your tank environment stable.

What is an Aquarium Alarm Auto Top Up Kit used for?

An Aquarium Alarm Auto Top Up Kit automatically adds water to your tank when levels drop due to evaporation. This ensures your aquarium maintains a consistent water level, keeping fish healthy and maintaining water parameters.

The complete guide

Buying Guide

6 min read Pet Supply Company

Auto Top Up Kit with Level Alarm: a buying guide

Best Aquarium Alarm Auto Top Up Kit: Ensuring Stable Water Levels for Healthy Fish

Maintaining consistent water levels in your aquarium is crucial for the well-being of your aquatic friends. Fluctuations due to evaporation can cause stress, salinity imbalances, and equipment damage. That’s where the best aquarium alarm auto top up kit comes in: a combination of water level sensors, refill pumps, and alert systems that automatically maintain optimal conditions. In this comprehensive guide, we’ll explore why an auto refill pump is indispensable, break down key components, profile the best fish tank alarm and top-up solutions, and share expert installation and maintenance tips. With over 2,000 words of insights, you’ll be ready to choose and install the perfect system for your tank.

Why an Aquarium Auto Top-Up System Matters

Evaporation is a constant in most aquariums, especially open-top builds and high-temperature setups. Even a small daily loss can accumulate over days, leading to:

Salinity Spikes: As water evaporates, salts concentrate, stressing fish and invertebrates.
Equipment Strain: Sumps and protein skimmers can run dry, causing pumps to suck air and overheat.
Parameter Instability: Sudden water level drops disrupt heater operation and mislead temperature readings.
Manual Hassles: Frequent top-offs are time-consuming and prone to overfilling or underfilling. A reliable fish tank auto refill pump paired with a water-level alert ensures seamless water management, safeguarding aquatic life and reducing maintenance.

Understanding How Aquarium Top-Up Kits Work

An integrated auto top-up kit typically comprises three main elements:

Water Level Sensor: Detects when water drops below a set threshold in the display tank or sump.
Refill Pump: Draws fresh water from a reservoir (RO/DI water, freshwater, or saltwater mix) and delivers it back into the tank.
Alarm Module: Alerts you if pumping fails, water supply is low, or sensor malfunctions occur. When the sensor signals a low-level condition, the pump activates. Once optimal height is reached, the system stops, preventing overflows. An audible or visual fish tank alarm notifies you of any issues needing manual intervention.

Key Benefits of an Automatic Top-Up and Alarm System

Integrating the best aquarium alarm auto top up kit into your setup delivers several advantages:

Consistent Salinity: Keeps freshwater loss balanced, crucial for saltwater aquaria.
Equipment Protection: Prevents skimmer and pump damage by maintaining minimum water levels.
Time Savings: Automates routine top-offs, freeing time for other tasks.
Early Warning: Alarm functions catch failures before they harm livestock.
Peace of Mind: Ideal for hobbyists who travel or keep complicated aquascapes.

Types of Aquarium Auto Top-Up Systems

Different kits offer varied features to suit hobbyist needs:

1. Mechanical Float Switch Systems

Simple float switches trigger the pump when water drops below a ball float. Pros include affordability and reliability, but installation requires precise alignment.

2. Optical Water Level Sensors

Non-mechanical IR sensors detect water presence without moving parts, reducing fouling. They are compact and easy to mount on glass.

3. Conductivity Probes

Metal probes measure conductivity changes; when water recedes and conductivity drops, the pump engages. These work well in saltwater tanks but may require cleaning to prevent corrosion.

4. Ultrasonic Level Detectors

Advanced systems use ultrasonic waves to gauge water height accurately. They typically integrate with digital controllers for precise multi-zone management.

5. Smart Digital Controllers

High-end packages combine sensors, pumps, and microcontrollers with smartphone integration. They provide customizable alerts, usage logs, and remote control via apps.

Top 5 Best Fish Tank Auto Refill Pumps & Alarm Kits

After testing various setups in freshwater and marine systems, we recommend the following as the best fish tank auto refill pump and alarm combos:

1. AquaGuard Pro Auto Top-Up Kit

Sensor: Dual optical sensors for redundancy.
Pump: Quiet 600 GPH magnetic-drive pump.
Alarm: Audible buzzer + LED indicator.
Features: Adjustable refill intervals, built-in check valve, expansion ports for multi-tank setups.
Why We Love It: Hassle-free install with pre-calibrated sensors and a robust alarm that cuts power if water reservoir runs dry.

2. ReefMaster Smart Top-Off System

Sensor: Ultrasonic level detector, non-invasive mounting.
Pump: 200 GPH peristaltic dosing pump for ultra-precise water delivery.
Alarm & Control: Wi-Fi enabled, smartphone alerts, custom geofencing.
Features: Multi-fluid capability (freshwater & saltwater), historical usage charts.
Why We Love It: The most versatile kit for reef aquariums, offering detailed analytics and remote management.

3. HydroMate Basic Auto Top-Up and Alert

Sensor: Mechanical float switch, corrosion-resistant plastic.
Pump: Submersible 400 GPH pump with anti-siphon valve.
Alarm: Simple horn that activates on sensor or pump failure.
Features: Budget-friendly, easy float height adjustments.
Why We Love It: Reliable and cost-effective, ideal for freshwater hobbyists on a budget.

4. SaltGuard Dual Probe Top-Off Station

Sensor: Platinum conductivity probes, optimized for salinity readings.
Pump: High-efficiency 500 GPH DC pump, adjustable speed.
Alarm: Digital display with audible/visual alerts and fail-safe shutoff.
Features: Auto-calibration routine and advanced anti-siphon protection.
Why We Love It: Excellent for marine tanks, maintaining precise salinity and water height.

5. MarinaGuard Mini Auto Top-Up System

Sensor: Optical IR sensor with low-profile design.
Pump: Compact 250 GPH inline pump, perfect for nano tanks.
Alarm: LED warning light and silent notification via app (Bluetooth).
Features: Magnetic mounting brackets, no-drill installation.
Why We Love It: Tailored for small setups, combining ease of use with discreet hardware.

Key Features to Evaluate Before Buying

When comparing the best aquarium alarm auto top up kit options, keep these factors in mind:

Pump Flow Rate: Match GPH to tank size and evaporation rate.
Sensor Type: Choose based on tank size, water type (fresh vs salt), and maintenance preference.
Alarm Sensitivity: Look for multi-level alerts (low-water, pump failure, power loss).
Installation Complexity: Some kits require drilling; others use magnetic or suction mounts.
Reservoir Capacity: Larger reservoirs need less frequent refills; compact systems suit smaller spaces.
Integration & Expandability: Ability to add extra sensors or link with existing controllers (e.g., Apex, Vertex).
Power Backup Options: Battery or UPS compatibility prevents failure during outages.

Installation Guide: Setting Up Your Auto Top-Up Kit

Follow these steps to ensure a smooth, leak-free installation of your fish tank auto refill pump and alarm system:

Select Sensor Location: In your sump or display tank, avoiding high flow areas.
Mount Sensor Securely: Use provided brackets, magnets, or suction cups; ensure the sensor face is clean.
Position Pump & Tubing: Place the refill pump below reservoir water level; run tubing through a drip loop.
Prime the Pump: Fill the tubing with water to avoid dry start damage.
Connect Alarm Module: Wire sensor and pump to the control unit; plug in power adapter.
Calibrate Water Levels: Adjust sensor trip points to your desired minimum and maximum heights.
Test System: Simulate low-water to confirm pump activation and alarm triggering.
Secure All Components: Tidy cables and tubing to prevent entanglement with other equipment.

Maintenance Tips for Long-Term Reliability

Regular upkeep keeps your best fish tank alarm and top-up kit functioning flawlessly:

Clean Sensors Monthly: Remove mineral buildup and algae with vinegar solution.
Inspect Tubing: Check for kinks, blockages, or wear; replace every 6, 12 months.
Test Alarm Functions: Trigger the alert manually to verify buzzer and lights work.
Lubricate Pump Seals: Follow manufacturer guidelines to prevent drying and cracking.
Monitor Reservoir: Refill with RO/DI water and change out stagnant water periodically.
Firmware Updates: For digital controllers, install software updates to improve performance.

Troubleshooting Common Issues

Even the best aquarium auto refill pump systems can encounter hiccups. Here’s how to address them:

Pump Fails to Activate: Check sensor alignment, power connections, and ensure tubing is primed.
False Alarms: Clean sensors of dirt or bubbles; secure sensor mounting to eliminate vibrations.
Water Leakage: Inspect tubing connections and use hose clamps or silicone sealant if necessary.
Uneven Refill: Adjust pump flow rate or change sensor trip thresholds.
System Won’t Power On: Verify power adapter output and fuse status in the alarm module.

Can I use tap water in the reservoir?

It’s best to use RO/DI water to prevent mineral buildup in your tank. Tap water can introduce unwanted contaminants and raise hardness.

How do I prevent algae growth in the reservoir?

Keep the reservoir covered and opaque to block light. Clean it regularly and consider adding a small pump for circulation.

Is an alarm necessary if the pump is reliable?

Yes, the alarm alerts you to failures due to power outages, empty reservoirs, or sensor faults that a pump alone cannot detect.

Can I integrate my top-up kit with my aquarium controller?

Many high-end kits offer dry contact outputs or digital interfaces compatible with controllers like Neptune Apex or GHL Profilux for unified monitoring.

What safety features should I look for?

Anti-siphon valves, float-switch backups, and dry-run protection are key features that prevent flooding and pump damage.

Conclusion

An automated water top-up system with built-in alarms is an essential investment for any serious aquarist. The best aquarium alarm auto top up kit not only preserves stable water parameters but also protects your equipment and livestock from preventable mishaps. Whether you choose a straightforward float-switch setup like the HydroMate or a smart controller-based solution like ReefMaster, prioritize sensor reliability, pump capacity, and robust alert functions. With proper installation, routine maintenance, and timely troubleshooting, your fish tank auto refill pump will ensure a pristine, worry-free aquatic environment for years to come.

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