In interested in breeding a pair of kribs and I want to be prepared if I'm overcome with fry. Would a 120L(~30Gallon) be sufficient for a pair of kribs + krib fry until the fry grow to a sellable size?
Depends on how big you intend to keep young. And how many young survive say first three months. You are pretty close at that point,..if you figure they are going to be hard to get buyers,..would not hurt to have another 15 or 20 ready in case of big spawn. Ordinarily, though you should be alright.