I live in central California, so we get a little warmer and a little colder than socal....I put 2 small texas(may not have been true texas)2" and 2 small convicts 1 1/2", about late march and they all died when we got that cold spell in april...I checked the water parameters and everything looked good temp was in the low 50's for about a week,,,,They fish had been in the pond about 2 weeks before they died.....I never covered the pond, didn't know about that yet....The pond is 5' at the widest and probably 2' at the deepest...BTW had a LMB about 6" and a black crappie right after that and they lived pretty good in there, but I took them out couple of weeks ago becasue I think water will get to warm for them...