i've heard that having a varied diet is better for fish's health and was wondering what i should feed my fish to supplement their normal foods, i'm currently feeding gouramis Fluval bug bites flakes "betta formula" as gouramis and bettas are the same family so i assumed it would be good for them, and my corys i just bought get Sera "tropical crisps" for bottom feeders. i would like to add some variation to their diet. also i'm not going to do live food because then i have to go to the trouble to KEEP it alive, but frozen foods would be ok. would corys and gouramis both appreciate frozen-thawed blood worms? any other suggestions for either group of fish? i'm planning on getting some neon tetras and otocinclus later on, so any suggestions for those would be good. i've heard of people feeding otos cucumber and zucchini, do you need to blanch it or can you just wash any pesticides off and throw it in?