Are these cyano?

[Boonboy]

Suddenly having these layer of brown stuff appearing on the LR. Can anyone ID what are they? I can blast them off with a turkey blaster. It is least before the lights come on. My tank is about 7 ~ 8 months old.

What is it and what should I do?

[Admiraltian]

Looks like it caused by Cyanobacteria.

[Tian85]

Run carbon and do 3 to 5 days black out. This method should kill off the cyano or other algae.

But still need to find out the root of your nutrient problem else it will come back.

What is your nutrients lvl?

[Boonboy]

Last time I measured the nutrient level were health but nuisance algae (eg bubble, cyano...etc) still exist. I guess the algae is helping to keep the parameter in check. Ha ha...

I did changed a new batch of rowaphos. Recently, changed salt mix from Red Sea coral pro to DD H2Ocean Pro. Also changed to new DI resin from madpetz (TDS:0). Removed all my cheato from sump as they are not doing well(color fade). Top layer of DSB hardened(like rock). Added (NP) bio pellet reactor. Shorten 2 hours of the MH. Reduced feeding from twice to once a day. Dosing NoPox.

The cyano seems to reduce but could not totally get rid.

What else can I do? Should I get some macro algae?

[julius]

Increase dissolved oxygen and position wave maker to blow those affected areas