Advice with green cayno.

[Randy Holmes-Farley Verified Community Expert]

Roughly once a month. I tend to go by how much algae is growing on the glass, but ends up being around a month, month and a half.

If the algae on the glass grows so slow that it needs a month before you clean it, I expect the stuff on the sand is getting nutrients from organic matter breaking down in the sand.

What kind of substrate is it?

I'd consider vacuuming it, or maybe even replacing it.

 

[cginter]

If the algae on the glass grows so slow that it needs a month before you clean it, I expect the stuff on the sand is getting nutrients from organic matter breaking down in the sand.

What kind of substrate is it?

I'd consider vacuuming it, or maybe even replacing it.

I clean the glass about once maybe twice a week. But that's me being a freak about clean glass. The Substrate is Caribbea sea, the medium corse sand. Not crushed coral. ( it tends to clump up and become hard around rocks). Me and you had a convo about the sand a couple months ago.

Since adding the new skimmer and cutting back the intensity and run time of the LEDs. It's not coming back as bad after the water change I did. Next time around I may add more than 1 cup of HC GFO when this stuff is exhausted.

 

[beaslbob]

I think you can manually harvest what you have and then kill your lights and stop feeding until the rest dies off.

Then resume with less lighting and feeding and adjust until the good stuff thrives and the ugly doesn't.