I have a betta, 3 ADF, and 2 mystery snails in a ten gallon right now. Is there any fish I can put in with my betta that wont get killed? And also, I want to start a coldwater tank. Would it be safe to move my betta, frogs, and snails to my 5 gallon when its done cycling and use the 10 gallon as a coldwater tank? What could I put in the 10 gallon?