How deep are your ponds in Florida? I imagine a constant hot
climate is a challenge to keeping fish safe and
cool is a problem.
As part of our pond maintenance we do frequent water exchanges by letting
the hose run in the pond for about 10 to 15 minutes several times a week
the water flows out of the pond, thus it's a water change. In hot weather
we do the water exchanges every day. Fortunately for us water is inexpensive
and we do not need to add de-clor.