Cannot get rid of cyano!

[Proteus]

Clams like nitrates. True.

My last battle with cyano was due to a Cbb which I was purposely over feeding my tank so it would eat. Even though I tested water and got zeros across the board I new there were nutrients in there that were feeding the cyano. I wonder if it was leach from the rocks as a few months before I had a ha outbreak from high po4. Even though the water colomn did not test high in those nutrients the rock and sand could be rich