I have been round and round the net, looking for a heater for 3, or 3.5 gal tank. Reading the reviews is killing me, lol. I pick one out then read and nope, not that one.
It must be adjustable, and reliable. In the winter it will be working much harder than summer.
Perhaps we could have a sticky for voted heaters per tank size?
Thanks very much.
I used to have fish many years ago, I miss them. Starting small, and working my way back. Although, when i visit walmart, my heart just breaks to see the dead bettas. Today, 2 very large and beautiful ones were dead(they just got this batch in about 5 days ago). Id buy them all if i had room.
But then they would just get more in...

and there was one today building a nest! Breaks my heart.