I've been using Hikari micro pellets that Petsmart pricematched for me at $3 a bag. I bough like 4-5 bags over a year ago. I also have been feeding hikari algae and cory waffers. I have a tub of the NLS small fish forumla I've used a little, but tossed it in the freezer a week ago since I got to use up the Hikari stuff first. I bought two large anglefish over a month ago and they needed bigger food. I ordered from Kensfish.com, cuz I see this stuff at the local fish auctions. I was also out of algae wafers, so I needed those. I ordered 1.5lbs of food for $20! So far it is working great, though the fish defiantly new there was a difference between hikari and the Ken's stuff. They digg into both of them now like they always do.
So I have over 2lbs of fish food now, that will probably last me 4 years

. Its all in the chest freezer right now. I use the RX med bottles to hold fish food I'm actually using ATM, then refill them from the freezer when they are empty. That way everything stays fresh.
I'll defiantly be sticking with the Ken's stuff, NLS and Hikari might be a little better but the cost is not worth it IMO. Kens "premium super color crumble #1" is almost a copy of Hikari micro pellets except with higher protein and fat. Not all Ken's food contains garlic, which may be why my fish were kinda wary of it at first. NLS and Hikari both have garlic which is a appetite stimulant( and immune system stimulant).