This is another HOG1 or HOG1x in a large sump and is filling in with growth to hopefully be fed to the fish: http://algaescrubber.net/forums/show...h-to-your-fish
This is another HOG1 or HOG1x in a large sump and is filling in with growth to hopefully be fed to the fish: http://algaescrubber.net/forums/show...h-to-your-fish
This HOG3 or 3x or 3xx needs a good brushing in a sink with running tap water. It looks like the bubble tubing might need adjusting, because bubbles are only coming out of the middle slit (this model has 3 air bubble slits in the black tubing), which is why the dark slime is only in the middle.
This HOG1 or 1x shows an interesting brown spot in the middle. It looks like the top of the spot is where the water line was, either because it was installed where the water was low, or because the top air hole was clogged with growth (although it looks open now).
Not really sure what made the middle brown, but it might be over-illumination from not cleaning, since it's a pattern that looks like two LEDs in the center of a HOG1.
Certainly it needed a good brushing in a sink a while ago, because you can see the slime letting go in spots like the red arrow. The Green Grabber growth surfaces can hold on to slime longer than a waterfall screen, but it can't hold on forever.
This makes a good point: One reason you don't see waterfall screens with thick layers of slime like this is because waterfall screens can't hold onto slime very well; it just all falls off because it's not underwater.
This HOG3 or 3x or 3xx (tm) scrubber from saltwater shows a type of growth that is not really hair algae, but not really slime either. Like slime, it will need brushing in your sink. Note in the second photo that the air tubing at the bottom is covered over.
This DROP1.4 or 1.4x shows how the strong PAR of the GEM5® lights on the side walls burn through the dark thick slime. This slime should have been brushed out sooner, but since it's here, the red 660nm light continues to shine through and thus filtering continues. Note that this slime would have already fallen off the screen of a waterfall scrubber (because it's above the water) but bubble upflows like this DROP are under water and thus the water supports the slime and keeps it from escaping. This is one reason why you don't see slime as often on waterfalls... because the slime has already fallen off and gone down the drain.
Growth box of a SURF4 or 4x with the saltwater drained out. This growth can be pulled out and fed to fish.
This DROP1.2x (tm) scrubber could be from fresh or saltwater. The nutrients in the water are very high, causing a dark/black slime growth that is holding on to the white Green Grabber® rocky textures. Most of this slime would have already fallen off of a waterfall scrubber screen because it is above the water.
A SURF4x scrubber® after a cleaning and maybe a spraying out too. Probably taken out of the sump to spray out slime from the Green Grabber® rocks and strings.
This new SURF4x scrubber (tm) is half shaded with the included black shade cloth, which dims the light that otherwise would be too bright reflecting from the white Green Grabber textures and strings. After more growth fills in, the cloth is not used anymore.
This HOG scrubber could be in fresh or saltwater, with the light removed. On the left is some growth swirling around, and on the right is later, with more growth, and the red line is the waterline of the display.
Keeping a HOG slightly above the waterline of a display or sump makes it more quiet, and keeps most of the salt/lime spray inside.
And this Cladophora type of growth, if you get it, is great to feed all types of fish...
http://algaescrubber.net/forums/show...h-to-your-fish
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