My sump for my 1000L is set up with a danio and a couple of albino cories to feed on any food that gets through the wet dry bio filtration- it also has a light and some plants to help suck up some nutrients. opened it up today to place a little food in there (once a week) and noticed a baby B/N its amazing how tough some fish are it would have had to get past an O, 3jewels, a clown knife, large plecs and a con, over a 70cmish waterfall through my pre filter (is only broken up $2 shop body loafers) through the bioballs ect and into the sump.
I didnt even know any of my BN were breeding or they would have gone in there own tank, but theres no way of catching them know..