new live sand carpet sand to smooth off cyano algae?

[scrapman]

My 15 year-old 90 gal LR-deep LS-happy everything has a continuing issue with Cyano Algae.
I suck a lot of it with my WC but it always come back.I have never used any commercial chemical advertised for this condition
What about laying a new "carpet" of LS on top of the cyano algae? Would that smoother the pest for ever or would it grow back?. Thanks

 

[bang guy]

It would just quickly grow back.
Attempt to find the cause and fix it. Then the Cyano will go away fairly quickly. The most common causes are:
Low waterflow
High Phosphates (overfeeding)
Overstocking
Undersized skimmer

 

[sly]

I would also add low salinity and old lighting...