Another update
They have grown beyond my wildest dreams.(double plus was an UNDER-estimate). I keep Aquamax 400 at the tank and 2 of the 6 now eat the roseys that come up for the feed. These 2 are an inch+ longer and fatter than others. They can totally inhale a 2" rosey. I did this on a whim and now will have to look at more info. Haven't searched yet but, any reproduction info? I have been involved in a Bamboo project and have missed my Pond Boss time and friends.
One more thing, the windmill that supplys water is a shallow well with large iron and mineral content. The Pacus seem to be thriving in this extreme HARD water.