boil egg yolk.
don't remember when was the last time i use it.
but now i won't even let it touch my tank.
it get messy.
the fry tend not to touch it, when its at the bottom.
goes bad quickly in the water.(smell when you unwarp the tank to feed them again)
if you do a even spread of it thought the tank.(a pain in the ass cleaning)
little tip from me to you
find food that small enough and stay alive long in the tank.
it will make your hobby a lot easier on you.
watching your fry or 5-10 minutes a day or hour plus a day won't make a different.
when you have live food inside the tank.
thing that you should be watching out for.(when you look)
is there any left over food from the last feed.(if so skip the next feeding)
any sign of sickness.(do whats needed)
does the fry look skinny.(feed a little for the your last feed)
check if the temperature was the (same or 1+-) as when your started
watching them won't make them get bigger or get better.