Still need an automatic feeder, as the feeder fish will need to eat. I want to try and have a bit of a monster tank separated from the rest with netting and have tilapia or guppies breeding behind it (depending on what you want to feed). Is definatley possible as I was talking to a guy in glasgow, whos quite big in UK fish circles I'm told, who goes to southamerica for 3/4months at a time. He has a an angelfish breeding setup that autofeeds and waterchanges... I assume he has a drip feed water changer like some of the lads here, but I havent managed to figure out how he feeds them... Hes a difficult guy to bump into but I'm dying to know. Not much help sorry, but there IS a way!