I have about 100-130 Geophagus parnaibae juvies, sized 1/2" to 3/4" for sale. These are f3's from fish I received from Ryan Smith last year.
They are raised in tap water (350ppm, ph 7.4-7.6, 84F). The parents are in my 200g discus tank, temp 84-86F, 120ppm. They are great at keeping the sand...