I'm working on putting a small pond (around 500-700 gallons) in my back yard in the Dallas fort worth area. I was wondering if some herichthys cyanoguttatus (true Texas cichlids) could over-winter without the need for heat. I've read that they can survive temperatures all the way down to 45 f and I know that their range comes within a couple hours south of my location. Don't know if they wold make it though. Does anybody have any experience trying something like this? I wonder if the water volume would be too low to hold temp. It rarely stays below freezing for an entire day and I could put a water trough de-icer in it if needed. Thought it might be cool, no pun intended, to have an actual year round cichlid pond, especially given the size is too small for koi and I don't particularly care for gold fish. I would also be open to any other cichlid ideas keeping in mind that they would also have to handle the warmer temperatures of a Texas summer.