Thanks everyone for the input. I went through the very ugly stage of the tank at about 1 month old. I had GHA all over the tank. I have a very healthy CUC and it was gone by the time month #2 came around. The tank was beautiful! Around 3.5 months I started noticing a small spot of the GHA. I now have random dime size spots on various rocks as well as the sand as mentioned and kind of stumped.
Perhaps some of things I have been doing and not doing are the issues.
I strain and dont strain the Mysis I feed. It depends on the days I spot feed a few of my corals. Which is every 3 days. On those days I will just melt the cube in water and suck up that water and do the feeding. The rest of the water goes into the tank. The days I dont spot feed I strain the Mysis.
I use reef roids twice a week for some of the other corals, but I put it directly into the water column and dont spot feed.
I went about 1 month not doing a water change, because my water parameters were not much different from what I posted above. I did do a water change last weekend. Its not a problem going back to once a week.
My CUC is still healthy, but I've tried to get my Turbo to eat the GHA and it just ignores it. Even after placing it on top of it numerous times. None of the other snails or crabs seem to want to touch it either.
I have a Diamond Goby, that cleans the sand, but seems to focus only on certain areas of the tank for extended periods of time, then moves onto the next spot forgetting the previous, as that area now gets dirty.
I was using GFO in my reactor, but I ran out. I really wasnt sure if it was doing anything so I didnt buy any more. Guess I could pick some more up and give it a shot.
Guess that is about all I can think Im doing/no doing now but I'll start up with the weekly water changes to see if that helps, since that is something I can do now.