Refugium brown film algae

[ral3xx]

Hi,

My 30 GAL aquarium has been doing well, but starting last week I start seeing this brownish film algae in the refugium. Today when I checked I saw some bubbles on the water heater as well. Does anyone have any ideas what the issue may be? I’ve been changing the water (20%) every 2 weeks, including replacing the main filter, cleaning the skimmer and washing the refugium sump foam. Thanks again!

 

[Auquanut]

Welcome to R2R! How long has the tank been running? Any signs of this in the display?

 

[ral3xx]

-

 

[ral3xx]

Welcome to R2R! How long has the tank been running? Any signs of this in the display?

I had the tank running for almost 3 months at my house. I bought it as an already established reef tank. I see no issues in the main display aquarium. Someone suggested that it may be the “refugium gassing”, but I am not entirely sure what that supposed to mean.

 

[Auquanut]

Not sure what it means either.