Usually don't post looking for advice or suggestions but I'm stumped. I have a BD male ray, female motoro, jardini, datnoid and 3 super red severums in my 300. All of my stock are finally eating massivore like pigs. Because of the rays I feed twice a day very careful to not overfeed and I siphon the uneaten food out within half hour. I'm starting to see a build up of brown building up on the glass and river rocks and its definitely not algae. l keep the lights on about 3 hours a day and water parameters are good. Appears to be massivore pellet residue build up. Don't wanna get a pleco because of the rays and I know it's hit or miss with flagtails and rays, what else would you guys suggest?
