Got my CRS the other day! the tank I intend on breeding them iin is at 78. Is this too warm for them to breed? The tank has no heater, but gets lots of sun. I don't have the tank in direct sun, but it does seem to heat that end of the apartment. Even with my AC set at 74, seems like the coolest it gets is 78 over there. I really don't want to get a chiller for a 15 gallon. Any tips so i can get optimal breeding from them?