Im not sure how big my ACF is but he is about a sub adult, I feed him a cube of bloodworm daily, some times when he starts to leave some of it i go back down to a half block then when he seems more hungry after i fed him half a block, the next day i go back to a full block and estimate really. But after reading these replys i get the feeling this might not be the right thing to do but he is perfectly healthy.
I only feed my ACF on bloodworm, i got advised to try different worms but he just didnt seem to be interested in anything else and where i live there isnt much other things i can find.