Thanks Wayne, unfortunately it's been a struggle lately. I've been fighting some dianoflagallates and they are how starting to effect my SPS. Seems to attach to any new growth. Hit it with a tooth brush and comes back within hours. Tried lights out for 3 days and it just keeps coming back. I hate to be the ginny pig here, but going to try out the hydrogen peroxide dosing method for 5 days and see how it works out.