In my 29g, I had a Betta sorority just take a crash to columnaris (the 24hr death kind). Wiped all my girls, not even the QT'd ones made it. Only mid-upper lvl swimmers left are the guppies that I'd used to cycle the tank. The past month I decided to let them take over the tank since I don't have to buy more fish, they'll provide their own now that they are not providing fresh fry for my bettas. I just had a large drop about 30 fry. They are with about 10 guppies m/f that are leaving them be. The tank has driftwood and a lot of plants with some java moss on the driftwood so they've been getting by on them.
My question is that I was wondering are there any small fry foods that can live in a community tank? I have a filter so I know most microorganisms for say Daphnia would get eaten up so they would not be sustained, I was wondering if brine shrimp or infusoria or something could be added to the tank and be sustained from the plants and algae that naturally occur providing food for my fry when they are first hatched since I am not really separating them. For this batch I crushed my flakes down to smaller bits not purely powder mixed it with hikari first bite powder and that seems to be getting by right now. Still I was wondering if something live could be added to the tank so there is some variation than flakes for my fry.