P. Pollenii aside from the 8 in male in the pic I have 10 youngsters (in another 65 gal), with an Alpha male always chasing everyone in the tank, so I started removing the male along with whoever is the biggest female and putting them in aother tank. The new pairs seem absolutely delighted, and a new Alpha male is promoted within minutes in the old tank. At this point I have 2 pairs the males being 4 in and females 3 in. There are several more potential pairs in the mix, but room is going to be an issue soon!