Mine have had several spawns now and the only fry I have had survive are the ones I have removed. I only grew on about ten and they will soon be big enough to join the adult group in the 7ft tank.I will leave them in the tank and see what happens
I think yours stand a much better chance of raising there own fry than mine. If you only have the biffa in there with them.It looks like they are respecting the helleri boundary?