I and now reading "Small Scale Aquaculture by Steven D. Van Gorder" just for general knowledge and enlightenment, but I got to thinking. We have a spa we don't use anymore in a sun room with windows nearly floor to ceiling on three sides and two sky dome windows. The water temperature can be controlled as can the room temp, and it has a one hp circulating pump that has a good sized filter for oxygenating the water. Perhaps add a biofilter. On a sunny day the room stays about 20 degrees warmer then the outside temperature. See any problems with this being use for minnows or Tilapia, if I could get it past the wife?
