Aquatop Submersible Heater - 100W - 10.5 in. - Up to 25 gal.
The 100w model is 10.5 in. long and good for aquariums up to 25 gallons.
For more information please read our article Fish Tank Heaters.
Ratings & Reviews
works great but very hard to turn and very long. I have this in a 10 gallon tank at the moment and it works great in there. I had it in a 20L tank and it could not keep up, but in my 10g it is almost perfect, cannot place horizontally in tank and 10 gallon is almost not deep enough.