I feed once a day in all my tanks, its usually in the afternoon.
For the 30 gallon, I grab 1-2 flakes crush them up and put the in the breeders net (for 3 platy fry), a pinch of flakes (for the platy, guppy, Neons, and Cherries), 2-3 sinking shrimp pellets (For cories and shrimp, but the shrimp usually get them first), and 1/2 or a full algae wafer (for Bristlenose and cories).
The 10 gallon, I am struggling on what the killi's eat, but other than that, I get a small pinch of Micro pellets (for tetras) and every now and then 1-2 shrimp pellets for the shrimp.
6.6 gallon I feed my betta 2-3 pellets and fast for once a week. On fridays I give him 2-3 bloodworms as a treat.