Although black slime absorbs the most nutrients from the water
(see http://algaescrubber.net/forums/show...he-best-filter)
it can cover up weak LED lights easily. But the strong 660nm deep red LED lights in
DROP scrubbers® cut through the slime to enable growth on the other side of the box.


Click image for larger version

Name:	drop1.2x leds cut thru slime.jpg
Views:	32
Size:	38.0 KB
ID:	8263