THEO Heater - 25W - Up to 7 gal.
25w model is rated for 2-7 gallon aquariums.
For complete product information, download the instruction manual.
|Width||0.75 IN. DIAMETER|
Ratings & Reviews
Hydor Theo 25W defective
When I first put this heater in my tank, it went on and off randomly although it wasn't near the temperature at which was set. I returned it.
<br>The heater is very small, but I'm not sure that's a good quality. The smaller the heater element, the smaller the surrounding area of water that gets heated.
Great heater for small tank
Works quite well
Very pleased, does a great job in my Fluval Edge 6 gallon.
Really powerful little heater
by Brian C.
I bought this heater to use in my Fluval Spec V nano reef tank. This thing is GREAT! Heats up the water quickly, and its slim profile fits in the pump chamber with room to spare, although I had to nix the suction cups (no big deal, though). I highly recommend.