Since buying some foods can be ideal (and easy), in some cases (specifically with fry or smaller fish) - have you ever made your own food supply such as with brine shrimp, daphnia, etc.? If so - how successfully was it?
This is something else I was completely unaware that you could do, make your own food for your fish. I have always bought any food for my fish from the store and never considered to even look into making my own food for the fish. It has got me interested though on how you can make your own food and what you would need to make it. Definitely something I will be looking into before I choose to get any more fish.