Well looks like my fry have become bored of feeding on microworms. Tried feeding them today and they completely ignored them. They seem more interested in nipping at my plants and the surface of my substrate.
Decided to make powdered fry food by finely grinding Northfin Krill Gold 1mm pellets. The fry seem eager to eat the stuff, but it sinks too fast, and the fry aren't big enough to take baby brineshrimp yet.