Various upflow growth pictures

This looks like a HOG1 from high nutrient saltwater. After a few weekly brushings, the dark growth should start turning lighter, and the growth ring should fill in...

Attachment 8283

This is a freshly baked algae casserole. I mean, it's actually the saltwater growth of a HOG3x or 3xx

Attachment 8285

This HOG.5 scrubber® is a bit small for filtering this freshwater tank, but plenty big enough to grow fresh food for it.

Attachment 8292

Small but mighty HOG1x scrubber growth in saltwater.

Attachment 8293

SURF4x packed and ready to harvest. Looks like two of the four bubble pathways have filled in.

Attachment 8296

First week's growth in a DROP.6 scrubber®. Sometimes it is black slime (high nutrients), and sometimes it is yellowish (low nutrients), but this one is probably from medium nutrients.

Attachment 8300

Green Worms! Actually, this SURF2 or 2x scrubber® is just showing an ultra rare type of growth which "fluffs up" on the Green Grabber® strings. It's not better; just different. And it needs to be cleaned off of the strings using your fingers, in your sink, because you generally don't want to use a brush on the strings (although you can still brush the white rocky walls).

Attachment 8303

This looks like a DROP1.2 from saltwater. The growth is mostly Cladophora species in this case, and it is sticking to the door a little bit even though there are no Green Grabber® rocky surfaces there. This growth is easily pulled out with your fingers, and fed to your fish. In freshwater you would not get this; you would instead get a bright green slime that would need brushing in your sink (but could still be fed to the fish).

Note the white spot in the lower right area; it is kept free of growth because the high brightness of the 660nm deep red light is more than enough to cause photo-inhibition on it's surface, meaning the growth is "burned off" of the LED, which keeps the light bright.

Attachment 8315

This SURF4 or 4x (cannot tell without counting the number of LEDs) is overgrown and sticking to the light.

Attachment 8316

This SURF4 or 4x has the water drained out

Attachment 8329