Factors that affect the tank with cyano. If you can answer yes to any- changes are in order
1- Are you running bright white lights for extended periods during day?
I was but cut them way down. I actually don't like the look at all with bright whites.
2- Are you using RO water and not tap or well?
Here's one Yes, I am using RO and then some, not tap.
3- Is the tank at or near a window
Unfortunately yes, I am going to put up curtains in my living room this weekend. It's been snowing lately and little sun so that's good.
4- are you feeding multiple times per day and have uneaten food that is noticeable on sandbed?
I feed very sparingly and try and be aware of any uneaten food. I also blow out the rocks a couple times a week with a turkey baster to filter out excess.
5- Are you testing for phosphates and have a high level?
I test for Phosphates with Hanna and they always come back barely detectable.
6- Do you have fairly good water movement almost creating a gyre effect?
I don't believe I had enough flow in my display or my sump for that matter and have now increased it a lot in both. I added a Mag9 to my sump and now it is like a wave pool. The display has rolling water on the surface while not being too harsh on the coral.
7- Are you utilizing a cleanup crew comprised of snails and red/blue leg hermits?
I have a pretty hefty clean up crew but could use a few more hermit crabs. Unfortunately they are very limited around me so I'll have to order some. There are about 12 in my tank now and one big Halloween crab, 4 Emeralds, 2 Fighting Conch.