I'm not sure if I'm doing something wrong or if this is just how it is, that the health bar starts to decline - and then turns yellow in some cases. I don't know if I can do anything different at this point. I'm at teh very beginning, and sort of back-tracking - trying to sell and save money for a third tank and a temperature controller and health plant. That's all I want to do right now.

For fish health, level 1, what can I do?