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Hydor Slim Heater for Bettas, Bowls and Aquariums up to 10 Gal
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- Helps guarantee your fish a healthy life by promoting the ideal water temperature
- Plug and play
- No temperature to set
- Can be positioned under gravel
- 90-Degree Angle for perfect betta bowl fit
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Size: 7.5 Watt, Round, up to 5 gal
It is always recommended to create a drip-loop when using any electrical appliance in an aquarium. Do not use in a container smaller than recommended.
Top Customer Reviews
1) Inexpensive and stupid simple to install
2) Works well in 3 gallon volume of water
1) "Always On": it does not have on/off when it hits a certain temperature thus it will keep raising temperature in a small volume of water. ***BECAUSE OF THIS YOU NEED TO MONITOR YOUR TEMPS CLOSELY, ESPECIALLY IN WARM ROOM and/or SUMMER!!!***
2) DO NOT recommend this heater for anything smaller than 3 gallons, see notes.
3) Even with gravel on top and lots of power cord slack, this heater has a tendency to want to "float" up to about the gravel line no matter how deep I put it under the gravel (have about 3/4 inch gravel on top).
BOTTOM LINE: Solid BUY if for 3-5gallons of water. If you are looking for a Betta tank heater for this volume of water, this is the one to get.
Bought this to initially heat a 1.5gallon tetra aquarium (see review) Tetra 29137 WaterWonders Aquarium Cube, 1.5 Gallons, Blackand it would raise the temp too high for Betta(upto 87F in a room that is about 75F). Moved the fish and this heater to 3gallon tetra tank Tetra Cube Aquarium Kit, 3-Gallon and temps ranged from 77-81F throughout the day. Not sure if that's too "wild" of a temperature sway in 24 hours but my Betta does not seem worse for wear or stressed. Will update this review if something changes.
In terms of dropping the disc into the water, we haven't tried and I don't want to risk it. Our bowl is too small (maybe 2 gallons capacity, but we usually keep it half to 2/3 full) to submerge the disc -- I think it would heat the water too much and kill the fish (as others have reported).
UPDATE: I decided to submerge the heater underneath the stones at the bottom of the tank after the exterior heating method described above failed to keep the water warm enough at night. The submerged heater under the rocks raises the temp in the 2-gallon bowl about 8 degrees, compared to 3 degrees using the exterior method. We'll keep it in there throughout the winter.
I am giving this product 4 stars based on price and convenience, but the design is flawed -- the cord exits the disc at a 90 degree angle instead of being flat, which limits the possibilities for pressing it against the exterior. It would also be great if there was some way to easily clip or attach it to the exterior of a tank.
I bought this little heater about a year ago for my
grandsons first pet- a fish, A pretty red Betta.
Hooked everything up and the new tank water stayed warm after adding this small warmer.
Fast forward to Last week .....our fish seemed sluggish and kept declining. He died this morning after watching him for 3 days-- taking less and less breaths. I thought he must have been really old when we bought him from the left store(a yr ago)
About an hour ago, I put my hand in the tank to get our fish(Paul Walker) - and the tank is very cold. I looked at the thermometer and its reading 70 degrees.
No wonder he died! I'm so upset that he had to die this way. Yesssss it's just a fish! It was a
Fish for my grandson to love and enjoy. He's quite upset!!! Honestly- as weird as it is, I'm sad too. I watched him decline like I was watching some poor soul in hospice.
I can't help but think that this might have been prevented if this little Betta and bowl tank warmer hadn't quit working. I will NEVER buy from this company again.
Think twice if you care for a fish- more than it just being a fish!
Thanks for reading...and don't buy it!
Most Recent Customer Reviews
My gosh is much happier with a heater. Because of the chord, its best placed against a wall on the bottom under rocks...so the heating isn't as even as I'd like. Read morePublished 47 minutes ago by simplyheidi
This heater is doing it's job but is having a hard time keeping up. First off, it's priced well and is very low profile in my tank. Read morePublished 1 day ago by Equilady
I'm baffled by all of the positive reviews I've read for this heater. I live in San Diego. The temp right now, in the dead of winter, is 68 degrees, yet I can't get my 3 gallon... Read morePublished 2 days ago by Danielle
My daughter received a baby betta as a gift in a less then half gallon tank and it barley kept the temperature to 72-74 degrees.it barley does the job. Read morePublished 2 days ago by Ricardo
This little heater is a working wonder, I just love how it keeps the tank at the right temperature my freshwater fish love their home being warm and cozy.Published 3 days ago by M. Chandler
Stick with the tank size that is labelled on the box and don't pay attention to the reviews that state that 1 gallon tanks are compatible. Read morePublished 3 days ago by Brandon Hunt
This heater is good for 2.5 or smaller. Unfortunately it can't keep my 5 gal Fluval above 65 F. It has a convenient suction cup but I would not recommend this for anything bigger... Read morePublished 4 days ago by Jessica Sitaras