Algal turf scrubber: any experience with this?

[andresont]

Originally Posted by trilinearmipmap

Just wondering who is running one of these. I have a refugium and macro growth seems to be slow.

Me too but grows OK i add Lugols , Tech-1 and Iodide, T5 2 feetx2 lighting
3 inch sugar size sand bed.
I think it works fine , but I dont see any significant difference with or without it
Next time will do the same but with less sand bed