Is this cyano?

I've had it on my sand but it's under control. It looks like it but I want to be sure before I take the rock out and rinse it. BTW, my water is in check and salinity at 1.024
Thanks

 

Try using a turkey baster to blow it off. If it comes off then it's most likely cyno. If not then could be coraline algae.

 

Looks like cyano to me.

Try improving surface agitation and flow to that area of you can.

What foods are you feeding and how often please?

 

I feed them frozen mysis daily. Fortunately I just bought another water pump to install.

 

Cut down your frozen food feeding to about twice a week. If you don't rinse your frozen foods, they are high on phosphates. That is the problem I was having.

 

Thanks

 

Yes that's what I would recommend and do it with ROdi water If at all possible