i've put together my first aquarium this week (5.5 gal
). everything's going great, except for the heater ... the thing keeps failing.
i've gone through an aquatic gardens and top fin submersible heater in 3 days. i'm trying to keep the aquarium at ~78 F; the room it's in drops down to ~55 F at night. i've been using a 50W heater.
the aquatic gardens looked like it shut itself down during the nights (i'd wake up and find the heater on, but the water ~66F). after 2 days, the thing refused to even turn on. i replaced it with the top fin; this thing didn't even make it through the first night ... it now refuses to turn on.
am i just pushing these things too hard (too much temperature differential)? seems hard to believe though, given that my tank is so small.
much thanks for any advice!