Screen without intervention.
Screen with mixed growth, from daily rubbing with a pencil .
I think that the red/purple thrives in water with a very high, dissolved organic content. My only problem. Is it takes more scrubber space. Than planed for.
So I started "plowing it thru, rather than scrubbing off" It is attached well enough to hang on in strands, rather than peel off. Allowing the greener stuff some breathing room.
It is keeping up with the nitrates produced, as long as I am not scraping it clean.
Yes that lets light into the darker areas, allowing them to grow greener.
Yes that's about as good as FW growth gets.
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