What is the best heater to use for a 3 gal Kritter Keeper?
I know this is kind of a stupid question, but I had a betta fish in the past kept in a 5 gal aquarium and with the fiter and everything, I went to my LFS and asked for a heater for a 5 gal, the guy hands me a heater, tells me how to set it and I leave. Go home, remove fish from aquarium, set heter, toss it in...
2 hours later check temp 74 degrees, float fish, 2 hrs later still 74 degrees, let fish swim out of cup.
Next day: go to feed my fish and he is dead! The heater malfunctioned and practicly boiled the water :/ I have been skeptical about getting a heater ever since then, but now that its getting colder I can't rly afford not to get one. HELP!