Various upflow growth pictures

[SantaMonica]

Looking inside a SURF4 to check the bubbling and growth

[SantaMonica]

This HOG1 or 1x is pulled out of a large saltwater sump. This size HOG is too small to do enough filtering by itself here, but it can help, and the growth can do all the herbivour feeding by just dropping it into the display for a day or so. Note the top 1 inch is flopped down; this is where the waterline was.

[SantaMonica]

This HOG3 or 3x or 3xx from saltwater shows very dark slime growth in the middle, and cyano on the lower outer parts. This is probably a HOG3, which has most of the light in the middle, and less light on the outer areas, because cyano grows in a scrubber usually only if light is low, when nutrients are high. This combination of cyano and green slime holds a lot of nutrinets, but must be brushed out more often because it does not hold on well, although the Green Grabber® rocky walls are doing the best it can (a regular waterfall screen could not hold on to any of this).

[SantaMonica]

This SURF4 or 4x scrubber (tm), or one half of a SURF8 or 8x scrubber, shows worms and tar!
http://algaescrubber.net/forums/show...he-best-filter

[SantaMonica]

This DROP1.4 scrubber® has just been brushed clean in the sink. Looks like the black shade screen has been used, but it should not be, because the dark growth means it needs more light, not less.

[SantaMonica]

Another example of high nutrients in the water, leading to black growth in the scrubber. This HOG1.3 scrubber® only has two LED lights, but still pulls nutrients:

http://algaescrubber.net/forums/show...-it-looks-like
http://algaescrubber.net/forums/show...he-best-filter

[SantaMonica]

This DROP1.4x is full

[SantaMonica]

This DROP1.4 is dealing with lots of high nutrients in the water

[SantaMonica]

This HOG1 or 1x scrubber® looks like its black shade cloth (not shown here) was kept on the top half, when it should have been removed. The shade from the cloth caused dark growth on the top; dark growth needs more light. If the cloth can be removed, the whole thing should start growing like the bottom.

Also, it should have been brushed clean much sooner, including the air tubing and circulation holes, every 7 to 10 days as is recommended.

[SantaMonica]

This SURF2 or 2x or 2xx is shown after being pulled out of a cylinder tank during a water change. Since there is no sump, the SURF floats at the top. And since this is saltwater, a SURF (which has strings) is ok; but if it were freshwater then a model without strings would be best.