I have cyano that is confined, almost entirely, to one rock that I can easily remove. Is it smart/possible/recommended to remove that rock and treat it. Would peroxide due the trick or should i use something better/stronger/more specific. Thoughts?
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Nice work! And I agree a natural way would be best. My issue is slightly different however because this is confined to a rock that can easily be removed so I would just be treating the rock not the whole tank. I would essentially be putting a clean rock in my tank.Before adding chemicals - recommend you try natural route. Strong UV light and phytoplankton.
Before and after pics (also have since increased the light point intensity by 15% on my Radions - up to 75%). Never cleaned any Cyano off the sand bed.
PO4 .05, NO3 2
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This is what I thought but I wanted to check my instinct. The water issue is next on the list.If I had Cyano confined to one rock that was easy to get out, and scrub outside the tank— and maybe hit it with some hydrogen peroxide— I would do it without thinking twice. It might not be a long-term fix, if there is a larger water chemistry probable at work, but it sure would make me feel better.
If you put the rock back in the same place where it was, maybe think of hitting that rock with more flow.

