Ok, that's not a turf scrubber. That's a section to grow macro algae.This tank has been neglected for a year and had one water change a few weeks ago when I decided I’m ready to get it fixed up.
I did install a turf scrubber and it did eliminate hair algae over the course of a few months but this is what remains and it’s something different
I respect your opinion and experience even if we have had bits of debate before. Allow me To add more details. These pictures are from December / early January. I had multiple algae issues at once - different forms. I added the scrubber first week of January. I did get growth out of it and harvested several times. I had a issue with my leds being too intense and had some white burned algae so I shaded the leds and that resolved.
The majority of the algae died off.
Quite possible. You can make DIY for pennies, that's what I do.Then…the scrubber stopped growing algae completely I might have depleted a trace element like iron or manganese