Does anyone know the answer to this question? If left to their own devices in a tank with only other N. Pulcher, what is the survival rate for fry? I've not really been doing much, just keeping the water clean and shooting in some pulverized spirulina from time to time. I have about 6 or 8 (hard to count) from a spawn that's about 2 or 3 weeks old (again - hard to tell when it happened). Last night I noticed a cloud of brand new free-swimmers just inside the mouth of another one of the caves.