I am new to this and have just got 5 platys and two danios at the moment, we were given them, and they are only in a 20L tank, which I am pretty sure is too small for them, I have worked like crazy over the last three weeks to keep the water safe, and I am just about managing it, until I could afford a new tank to put them in. one of the platys has ich, i cant turn up the heater as it automatically turns off at 25 degrees. I have put salt in the tank, and the platys seems happier to be honest, but the danios i am not so sure about. I just bought a bigger tank to put them in, 200L ...but one ..I dont know if I should move them until they are cured...and two can you tell me if the danios cant take the salt? Would it be better to move them where there is a better water quality, and a heater i can regulate, so less likely to have problems from that point of view? Thank you.