chaeto algae in sump

Another vote for low flow causing most of that issue. I tend to let a little bit bloom in the fuge section of my sump and that keeps it from showing up in my display thank. However, the root cause is excess nutrients in the water fueling growth. That is why I try to direct it instead of prevent it most of the time.
 
Next water change can you pull it out and give it a good shaking or cleaning in the water you pull out from the tank?
 
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