I was going through my sump this morning (about a 30gal mud filter) when i discovered a fish. More to the point a bangaii cardinal. He is about 1/2". My question is how did he get there? I had a pair although one has since disappeared. I know they breed and the only thing I can thin of is that one of the fry must have gone through the overflow ( a 75gal oceanic reef tank) and even though there is a foam filter, he must have been small enough to have gone though a hole. He's now about 1/2" so I don't know how long he's been in there
Quite interesting what you find in the sump.