Hi, guys I was wanting to know what is the lowest temps these guys can safely stay at, I have 4 4"ers in my pond oustside and last week we had a cold front here in Houston the water got down to 52 F. I lost about 20 out of 25 2" red devils but the cats are ok and were active the whole time, actually feeding on the red devils as they were dying off, I did'nt think they would make it at first but they pulled through with flying colors.