Originally posted by ewest:
BTW how is the hot tub RAS working ? 
In a word...GREAT! I cranked up the temps in late February and have simply been amazed at the transformation in the fish. Metabolism has taken off and the weight gains are just amazing to see. The fish are simply beautiful, especially the red-bellied Pacu which have exploded from about 2 to 3 inches to I'm guessing about 7 or 8 inches. I can readily see now why people have trouble getting an aquarium large enough to keep up with their growths.
I may have raised the temps too soon for my system, however, because the fish biomass resulting is really getting large. In about three weeks, I'll turn a whole bunch of them loose into the ponds reducing the biomass in the system. Haven't seen any spawning although activity along those lines is clearly visible. If spawning happens in the system, I think it will be after I've released a bunch of fish into the ponds and made some room in the system for some new babies.
