I had been feeding Omega One flakes in my community tank for awhile, until I ran out. I recently bought some NLS flakes because I heard really good things about the food. I've been feeding the NLS flakes for a few days now and they don't seem as "ravenous" as before when fed. Is this normal? Should I just give them some time to get used to it? The NLS container is pretty big and I don't want to waste it.