Various upflow growth pictures

Not spaghetti and meat sauce. Looks like a modified HOG3 or 3x or 3xx scrubber that needed brushing out (in a sink) a week ago. Slime it still good though...
http://algaescrubber.net/forums/show...he-best-filter

Attachment 8668

This SURF4 or 4x (or half SURF8 or 8x) shows the strings circled around 3 of the 4 holes where the upflowing air bubbles come up (red arrows). This demonstrates how the air bubbles create vertical pathways for light to shine down deeper into thick growth, which cannot happen with waterfalls.

Attachment 8672

This DROP1.2 (an older one with clear tubing) looks like some growth has been pulled out by hand. For more filtering, you could brush the surfaces off in the sink under freshwater.

Attachment 8674

This DROP1.4x (older model with clear tubing) shows how the 6 high power LEDs burn through the growth.

Attachment 8676

This type of slime growth on this RAIN4 waterfall scrubber in saltwater really needs the screen, tray, and pipe slot to be brushed clean every 3 or 4 days, and would do best with an optional Slime Screen so the slime can reallly hang on. More light is not the answer, as you can see, because the light is strong enough to make a growth ring, which is about as strong a light as you can get. More info:

http://algaescrubber.net/forums/show...3-Growth-Rings
http://algaescrubber.net/forums/show...he-best-filter
https://www.santa-monica.cc/cdn-cgi/...es%20front.jpg

Attachment 8680

This SURF2 or 2x or 2xx scrubber® shows some of the bare Green Grabber® strings at the top, but if you look close you can see green growth following some of the other strings.

Attachment 8705

This DROP.6 has met it's match, and the single LED light is covered in growth down to the air tubing at the bottom.

Attachment 8710

A nice little HOG1 which looks to be on the side of a sump, probably to grow some live food for the saltwater tank above it.

Attachment 8718

This black plastic shade screen from a DROP (tm) scrubber even has growth on it. Once removed, all the growth will be on the white Green Grabber® rocky surfaces.

Attachment 8721

This HOG2 or 2x in freshwater is at the back of the tank, and can be laid back on the gravel so the fish can eat.

Attachment 8728