Powerhead cleaning - Algae

[jpas]

So there are a ton of threads that discuss using vinegar or citric acid for cleaning calcium based deposits from powerheads.

What is the best way to get algae off of these, soaking either vinegar or citric acid seems to do very little.

 

[Mr. Mojo Rising]

scrubbing is the only real way, everything else just helps, but you still need to scrub