It works incredibly good! I totally forget about fill my tank with that heavy 20-Litre water bottle every 2-3 days! Now I can go on vacation knowing that my tank will not run out of water! Love it 😍

Double Application Aquarium Alarm for Auto refill and one-key drain water


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

Original price was: £159.Current price is: £129.

(7 customer reviews)


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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.

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Product Description


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

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Original price was: £159.Current price is: £129.

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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.



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.


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.



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.
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Frequently Asked Questions

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Which payment methods are accepted?

We currently only accept credit card payments, PayPal & Crypto currency. More payment methods will be added in the future.

What currency are the prices displayed in?

All of our prices are displayed in £ GBP.

What are your delivery options and how long will it take?

  • United Kingdom: Free Delivery, 5-7 days


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Do I get a receipt for my order?

You will be sent a receipt for your order by email after payment is made. You will also receive a confirmation email with a tracking number once your item has been shipped.

Do you have a shop location?

We are a “online supplier”, with no physical shop or premises. In this way, we are able to pass our considerable savings directly to you.

Are your products new or second hand?

All of our products are brand new! We sell end of line, excess stock and deleted lines from some of the largest wholesalers at a fraction of the price!

Do your products come with warranty?

Unless otherwise stated all items purchased from Clearance Warehouse come with a standard consumer warranty.

Can I return my item?

We will gladly Refund or Exchange an item if:

  • The item is faulty
  • The item is not the same as the description or as shown or advertised
  • The item does not perform as per the manufacturers intention

You may not be entitled to a Refund or Exchange if:

  • You have changed your mind and no longer require the item
  • You decide you cannot afford the item
  • You found the item cheaper elsewhere
  • The style, colour, or size is not suitable
  • You were responsible for the fault
  • All refund requests MUST be accompanied with an original receipt or other proof of purchase.
  • Please feel free to discuss our policy with our Manager prior to purchase.

Note that measurements quoted on our website and affiliated sites and social media channels are subject to slight variances, when purchasing items measure all items to ensure they fit your space.

Product Shipping

How do I know if my order has been shipped?

Once your order is shipped, it will be marked as complete in our database and you will receive a confirmation email with a tracking number.

I haven't received my order yet! Is it lost?

If you have any concerns with your order, please contact our support team by email and they will be glad to assist you. Most emails are answered within 1 business day.

Support Team: [email protected]

7 reviews for Aquarium Alarm Auto Top Up Kit | Fish Tank Auto Refill Pump

  1. 5ed9386e3820a21d9497eeaf8a733c54?s=80&d=mm&r=g


    It works incredibly good! I totally forget about fill my tank with that heavy 20L water bottle every 2-3 days! Now I can go on vacation knowing that my tank will not run out of water! Love it

  2. 5ed9386e3820a21d9497eeaf8a733c54?s=80&d=mm&r=g


    This is well designed Auto top off. It is quite easy to install. The pump is small enough to give you quite a few options for fitting into smaller water containers. This unit does a great job alerting you if you have to much water in tank as well as plenty of pressure to pump water to fill up your tank to the level you want to keep it at. Currently I am using it on my 40L salt water tank to keep my water topped off. It is doing a great job.

  3. 5ed9386e3820a21d9497eeaf8a733c54?s=80&d=mm&r=g


    The system is easy to install and tops off the tank consistently. The pump operates quietly – it is audible but unobtrusive in a quiet room, one almost has to listen for it.

  4. 5ed9386e3820a21d9497eeaf8a733c54?s=80&d=mm&r=g


    Super quiet and works like a champ. Very easy setup.

  5. 5ed9386e3820a21d9497eeaf8a733c54?s=80&d=mm&r=g


    I am amazed at the amount of evaporation that occurs in my tank. This works great and is simple to setup and adjust.

  6. 5ed9386e3820a21d9497eeaf8a733c54?s=80&d=mm&r=g


    Works as describe and I like it. It keep water level of the aquarium sump perfectly at level and no problem so far.

  7. 5ed9386e3820a21d9497eeaf8a733c54?s=80&d=mm&r=g


    This auto top off is nice has optical sensors with 3 levels. Also has a pump out feature with an extra port for another pump great add on. Maybe a future use for auto water changes. I really like that it has a low reservoir sensor as well with a audible alarm.

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