I like Ken's Fish foods. But... I haven't had an order under $75.00 in a while. ;-) I currently have eleven tanks running. A couple of dozen more in storage.
Half a pound quantities seems like a lot to people with only one tank, but if you're feeding more than one tank, it's the best way of getting and keeping reasonably priced foods.
There is NOthing wrong with any of the commercially sold fish foods from national brands.
The manufacturers all have long term breeding programs to test the safety and quality of their foods.
Everyone else copies those types of formulations.