Hey all, we have just got a tropical fish tank. Its a 34l Aqua one tank with 5 tetras, a dwarf gourami and a yellow algae eater in it. They seem to be doing fine but we live in a crappy student flat (no insulation, heater etc etc) and have noticed the tank temperature can drop as low as 21 degrees! There is no place in the house where they will be any warmer.
We currently have 50w heater, would an upgrade to a 100w or even bigger be the simple fix for this problem?