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So why does algae form in filter pipes and spray bars even when there is none in the tank ? Is there any way to prevent it ? As far as I know it can only be removed by regular cleaning.

So my 60 litre tank has Cladophora in my Fissidens and HC. Quite a bit of it. From what I have read once I have clado, it will keep growing just like a plant. So far I have tried squirting excel on it with the filters off immediately followed by a 4 day blackout. It did turn brown but it has...

As the title says, will a higher amount of water movement cause algae or encourage algae that is already there to grow ? I was just wondering what the thoughts on this were. Im using an external filter for the first time and noticed that there is some gren dust/diatom type algae growing inside...