Over the last few years since I wrote this, it's not often that a new idea pops up that make it worth putting out an update on methodology. Recent, LED lighting has been about the only thing worth updating.
Leave it to Paul B!
Here's a new method for making an algae scrubber screen that, IMO, could very well be a game changer.
Read about it in the resource!
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Screen & Fasteners
The ideal growth substrate material, and how to keep it in place
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Mortar Screen method added
