Sps w/Brown algae looking stuff

[Jamesmost]

Started on tips of a few, now working its way down...
What to do?


Mixed reef, mostly sps as of late...
Phosban reactor
Skimmer
Uv
115 gallon
Fritz salt
Orphik Atlantic latest and greatest
Sal 1.026
Temp 77. 6
Ph 8. 1
Cal 420
Alk 8.55
Nitrate 17
Phosphate. 00
Ammonia 0
Nitrite 0
Mag 1460


I'll take a couple more pics Ina bit

 

[Jamesmost]

Looking dee
Per, think its cyano,
My lights were set with a peak od red and green,,,,
Leveled light settings
Tyrkey basted the algae/bacteria...

 

[Hove75]

Do have it bubbles in it?

 

[editour2]

Nitrates 17....in my opinion that is too high...below 5 would be acceptable. Don't know why you would have zero phosphates to go along with that number...are you dosing nitrates (sodium nitrate)?

 

[Reefinny]

James - post some pics. When we were talking sounded like diatoms to me.