What's wrong with my refugium?

[NanaReefer]

20L sump, 3 chambers. 1st=overflow and skimmer. 2nd fuge area. 3rd return.

Light is a Utilitech Par30 15w 5k LED.
Added a Koralia Nano power head in fuge area.
1 1/2" SB, Chaeto 1 large piece of coral skeleton.

I've got cyano in fuge area
Chaeto dying

 

[Bad Company]

Not enough light perhaps... depends distance etc. Pics? Flow?

 

[thedasher]

Need some pictures

 

[fishroomlady]

could be the skimmer is taking out nutrients that the algae would absorb? lighting could also be an issue.

 

[NanaReefer]

This is the lamp I'm using.

Here's the fuge area. Lamp about 6-8" from surface. Runs from 10pm till 6am

Return pump is a Sicce Syncra 2.0

 

[tigerdragon]

Should work ok

 

[NanaReefer]

Well I removed the power head and harvested half the chaeto. Was suggested my nitrates may be to low...go figure

 

[thedasher]

Well I removed the power head and harvested half the chaeto. Was suggested my nitrates may be to low...go figure

I guess thats good

 

[mfinn]

I'm using identical light and methods, but getting different results.
I wonder if the tank being new has anything to do with it.

I use to get cyanobacteria ( red slime) in my refugiums when I didn't have a powerhead in it.

Maybe by removing some, it will allow the water to circulate around and through the chaeto better.