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Customer's HOG scrubber® taken out of a saltwater sump. This one would be a HOG3 or 3x or 3xx because the wet side is the same; the difference is in the lights, which you can't see here.
Some HOG scrubbers grow mostly on the strings, and some grow mostly on the Green Grabber® white rocky textures (dark slime does this), but this one is growing on both.
Attachment 8177
HOG2 or 2x scrubber® full of dark or black slime. Slime usually fills in first, and the slime grabs the bulk of the nutrients in the water while the grabbing is easy. But brush that slime out often, because it does not hold on well and will let go and flow away.
Attachment 8194
This customer's HOG2 or 2x scrubber® in a freshwater tank was growing very thick on the Green Grabber® white rocky surfaces (left photo), then the growth started growing on the glass where the red light shines through (right photo). So when the HOG is removed from the glass, the fish and snails can eat live algae from the glass, and if you keep the HOG tray in the water too, then the growth in it can also be eaten.
Attachment 8201
Customer's HOG scrubber® which could be a HOG2, 2x, 3, 3x or 3xx, but you can't tell without knowing if there are strings inside, and without knowing how many LED's are in the light. But the growth is definitely in saltwater, and it looks like it is all Cladophora species. The pathway down the middle is probably where bubbles found a way to travel through, and, the space at the top is the waterline inside the unit (a small air pocket). This amount of growth is between 2 and 3 cubes of feeding per day.
Attachment 8206
Customer's hand-harvesting of a DROP1.4 scrubber after it has been growing a while. You can't always hand-harvest, but it's neat when you can. And of course, some of the growth could be fed right back to the tank.
https://www.youtube.com/watch?v=XebTP07jkGQ
Attachment 8217
Opening a SURF4 or 4x to see the growth in the box and on the light.
Attachment 8218
HOG1 or 1x scrubber® pulled out of saltwater. The green is mostly Cladophora species. Below that is darker slime, caused by shading from the green (less light causes darker growth). Should probably clean a day or so earlier so that the dark occurs less; dark holds a lot of nutrients but will let go sooner and clog the holes. And a good brushing down to the white Green Grabber® surface is best.
Attachment 8224
Six weeks of a HOG2 or 2x in a new freshwater system
Attachment 8229
DROP.6x which was in very high nutrient water, causing black slime to grow (black slime consumes more nutrients than any other growth). Note the growth rings which still get through the slime. This type of black slime will not hold on to a typical waterfall screen. More info:
http://algaescrubber.net/forums/show...3-Growth-Rings
http://algaescrubber.net/forums/show...he-best-filter
Attachment 8230
A very packed HOG1x from a saltwater system. The "X" looks neat, but not sure what caused it.
Attachment 8232