Macro not growing

[Oaken]

Parameters are great. Macro is healthy and alive and my refugium is FULL of algae like a thick black web like algae that's covering my refugium bed and other types, yet I have no growth.

My macro has been the same size since month 1, of course the tank is the only 6 months old my grow light I got off amazon stays on 24/7.

I have calupera and chaeto that are about the size of a baseball and do not turn they just float. My dt has no algae also, which is great but I currently am battling the heck out of cyano which I just got about a month ago.

 

[EmdeReef]

What are your nitrates and phosphates at?

What light do you use in your refugium and for how many hours a day?

 

[Oaken]

What are your nitrates and phosphates at?

What light do you use in your refugium and for how many hours a day?

I put this all in the post, but 7 nitrates and .05 phosphate. 24 hrs a day, and a pink amazon grow light generic brand very strong

 

[EmdeReef]

I would start by reducing lights to 8-12hrs.

You may dose some iron as well and see if things improve in a week or so.

 

[Oaken]

I would start by reducing lights to 8-12hrs.

You may dose some iron as well and see if things improve in a week or so.

Ok I'll try that I figured cyano is results of my phosphates

 

[Oaken]

Any other idea iron didnt hell

 

[cbellm]

I usually see more cyano when my nitrate is nearly 0 you may want to see if you are getting a accurate reading, Cyano could be starving out some of the macro grown. I know it can be scary but chemiclean seems to be the way to go on killing cyano. I have a planted refugium myself and have had difficulty with similar issues when Nitrate and Phosphate are nearly undetectable.

 

[AlgaeBarn]

Any other idea iron didnt hell

What type of iron are you dosing?

Can you increase the flow in your refugium with a powerhead?

Cyanobacteria can fix nitrogen from the air, so it doesnt need nitrogen from the water column(such as nitrates).