Hey all, I got this tank from a guy a few weeks back but getting a lot of this green on the rock recently. It's not slimy and doesn't want to come off even by scrubbing with a toothbrush. There are what looks to be air bubbles forming you can see on the rock as well. The first 3 pics were taken Wednesday with different lighting. The other 2 were pics were taken tonight. Any suggestions on identifying and dealing with the potential issue is appreciated. Also wondering about the little tube-like organisms and if those are an issue as well, vermetid snails maybe?
PO4 -0.02
Nitrate 8
Alk 8.8
Ca 485
Salinity 35
pH 8.2
Doing weekly water changes, use a UV sterilizer, using ro/do water as well but just need to know if I should be concerned and what to do if there is an issue that needs addressing.

PO4 -0.02
Nitrate 8
Alk 8.8
Ca 485
Salinity 35
pH 8.2
Doing weekly water changes, use a UV sterilizer, using ro/do water as well but just need to know if I should be concerned and what to do if there is an issue that needs addressing.

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