So, I went to my parents for the holidays. I was worried the power would go out in my apartment while I was gone due to ice and that my fish would die. So I brought them home with me and kept them temporarily in a 5 gallon. It has a heater and I add water sometimes to give air. Well my 3 red eyed tetras died. No idea why. So when I take the fish back to my apartment in the 10 gallon, what should I add? Maybe just a few more serpae? a few guppy? The betta I have is pretty laid back, doesn't attack.