Cyano in my refugium

[Sharkey18]

So, the new refugium on my 120 has been running for several months and still the only thing that will grow in there is cyano.

 

Caulerpa: dead

 

Chaeto: shrinking, certainly not growing, covered in cyano

 

gracilaria: shrinking, also covered in cyano

 

I have stopped running GFO and carbon. (Just want to stop GFO but it's a dual reactor, waiting to clean out GFO)

 

There is a little bit of cyano in the display tank but I recently increased the flow and that has mostly subsided. No algae issue in DT.

5100 K Light bulb was replaced 6/20.

Refugium lights run at night.

 

Any idea why cyano would grow but no other alage?

 

Before I replaced the sump, I had caulerpa growing like crazy.

 

 

 

Laura

[BowieReefer84]

I would cut the light off on the fuge until all the cyano is gone. Then try again with some macro's. What snails/crabs are in your fuge? I like ceriths and nassarius A LOT!

 

If your display is fine, I am sure it will go away.