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Need help i have cyano
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How long has the tank been up? How many gallons and what kind of setup? Cyano is normally a flow or nutrient problem. Are you dosing anything or using a carbon source? Have you made any changes prior to seeing the cyano?
That may help.
How bad is the cyano?
Chemipure will help, as others said flow will help too. Siphon out as much as you can. As your tank matures it should start to go away my suggestion is to make sure it does not start growing on your LPS, it can kill them... If it continues to be a problem think about a reactor
What kind of lighting?
If the lighting is aged the spectrum may have shifted to the point cyano takes off.
Aged lighting can trigger a cyano bloom.
When I see hints of cyano on the sand bed I know it is time to change out my halides.
GFO or Biopellet reactors are commonly used to address nitrates and phosphates.
A biopellet reactor can be effective long term at removing nitrates (phosphates are up to debate), but it won't give you that quick fix as it takes a couple of months to establish the bacteria to be effective.
A GFO reactor can provide a quick fix by sequestering PO4 directly.
Draw back to GFO is it requires regular maintenance and media replacement to remain effective.

