Hydor 400W Submersible Aquarium Heater - Original Theo

I have a 125 gallon fish tank and it was hard to find a heater that could keep the water warm with the right price. I went to different pet stores to price a heater it was less watts and more money. I purchased a aquarium heater from another source in which i was very dissatisfied, it worked 3 weeks and stopped. I decided i would give it one more try, so i order the Hydor Theo Submersible Aquarium Heater 400w UL from amazon and i have been very pleased with it. I did find out it is always better to get anything electrical with the UL (certified by Underwriters Laboratories) which is government approved. I would highly recommend this product also i am very pleased with Amazon's service.

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got this not too long ago and so far it was been awesome! I have it as the lone heater fully submerged in my 90 tank and it heated up the tank pretty fast. its been consistantly at 82f with no fluctuations at all. would recommend to anyone with a large tank

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I have a 100 gal tank. I needed to add a heater that would be dependable, safe, and easy to use. The Hydor Theo 400w heater has exceeded my expectations. I highly recommend this heater.

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works great, nice product. it has two ways of setup. circulation of the tanks is great. will recomend this product.

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this heater does not shut off when required . i am tryin to maintain a 80 degree temp but i currently have heater set to 77 and water temp is 81-82 degrees . Im sure once i find the correct setting it will work great but the settings are worthless

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