My opinion is to get as much food as the fry can eat to them, without overfeeding to pollute the water. I use live plants in the spawn tank, to produce infusoria. I don't depend on this, but it can't hurt to try and have some. I feed 2 drops of Liquidfry#1 a day for 2 days. The liduidfry is to feed the infusoria, which in turn is eaten by the fry. There is also very tiny particles of food in it for any fry big enough to eat it. I start this after the eggs have hatched for 24 hrs. The fry really live on the egg sac for 2 days, but the bigger fry will start to eat if they find food. I also feed vinegar eels for 3 days, starting at 36 hrs from hatching. This is the time I remove my males. The vinegar eels are very small. They are not real nutritious, but because they are so small...all the fry can eat them. After 3 days from free swimming, I start feeding Micro worms. I feed MW for 3 weeks.At 1 week old, I start feeding BBS also. Always feed a small dose of MW before feeding BBS, and the SBD will not happen as often. Being extra careful extracting the BBS from the hatchery, will help in not getting any shells or unhatched eggs mixed in. At 3 weeks of age, I start feeding frozen Daphnia along with the BBS. Each week thereafter, I add frozen foods to their menu. I start adding the flake mix I make at 5 weeks old. By 8 weeks old, they will eat anything I feed them. Getting them foods that are small enough for them to eat at a few days old, is key to raising most of the fry. You will only get out of this what you are willing to put in it. Growing HMs is alot of work. It starts at birth. Clean water and a variety of high protein foods is a must for HM's. They have to have the combination of genes to produce that, but even then, conditions will determine if you achieve it or not.