HA is getting me down

[Koresample]

the root problem must be coming from somewhere though...i have taken rock out and scrubbed it clean with a wire brush while changing the water and poof...one week later its right back again!

I was feeding my corals nutra kol nutra plus liquid food (about 15 drops/day) plus phytofeast (about 20 drops/day) for about 2 months. I haven't fed them that stuff for two months now and i only feed them about 1/4" x 1/4" of either flake or fresh mysis shrimp (minus the juice), once per day.