Let's talk live food

[MondoBongo]

It's actually very simple. The fatty acids (HUFA's) are quite different in food's of FW origin and Marine origin. As a result, foods of FW origin are not nutritionally adequate for Marine fish. Something that becomes very apparent when you are actually trying to hatch out and rear Marine fish larvae. In other words, ideally you should be feeding Marine fish foods of marine origin, not fresh water

But black worms aren't from a marine source? Yet they seemed to yield him the best results.

 

[billsreef]

Large nest sizes with poor hatch rates are not best results

Decent nest sizes with very high hatch rates and high larval survival can be had with Marine based foods, and absolutely no blackworms or other FW food sources.... Much better results IME.

 

[MondoBongo]

Ah gotcha!