1. Nov 17, 2010 #1
   

   PotRoast Well-Known ReefKeeper

   999

   Ratings:

   +24 / 0 / -0

   I have recently gotten a couple outbreaks of red algae that blankets rock. It is easily blown off by a steady current. It also comes and goes and never really gets problamatic. It also does not really bother me that much.
   
   I have one year old T-5 bulbs. I have not been running half of them (blues) for over a month due to a ballast/timer/wiring issue that I have not had time to address.
   
   I assume this reduced lighting is what is causing the red algae. Maybe not. Anyone have any ideas on what I have and how to rid myself of it?

    
2. Nov 17, 2010 #2
   Cedar Falls

   vikubz Well-Known ReefKeeper

   734

   Cedar Falls

   Ratings:

   +8 / 0 / -0

   You have the good ol' cyanobacteria. In my experience it will build up wherever you have a build up of waste. If it keeps coming back in the same spots you can just re-orient you flow so that the detritus doesn't settle there. I have heard some folks say it is related to lighting issues, but I have always found that where you get low flow, that where things will settle and that's where you'll have cyano.

    

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