Automatic feeder for Chili Rasboras

[KenK]

I have a group of Chili Rasboras in a five-gallon tank and I am currently feeding Easy Fry fish food. I am looking for an automatic feeder that I can use. I tried one rotating drum feeder but the food quickly clumped together. Is there a feeder that will work with Easy Fry food or is there another food I can try that will work better with automatic feeders?

If automatic feeding is not a practical option, how many days can Chili Rasboras go between feedings? They are in a heavily planted tank. 

[ange]

I have personally found humidity to be an issue with every auto-feeder that I've tried and had to resort to external solutions. Have you tried adding a desiccant packet to the drum? That may help to a limited extent. Other possible solutions could be filling the drum slightly less so that food is consumed more quickly and positioning the feeder so that it is away from sources of surface agitation.