I have a 75 gal tank that has several BNP's in it and 4 Frontosa's (that's it) I would love to breed the BNP's and wandered if I should move them into their own tank or not. Or will they do fine in with the Fronts?
They'll do fine with the fronts, given the right cave shape, but the fry won't be able to survive. If you let the parents spawn in there and didn't mind losing any that were kicked out of the cave prematurely, the growout could then just be used for a batch of fry at a time. Baby bristlenose eat a ton and grow pretty quickly.