Here's a customer's HOG3 or 3x or 3xx in saltwater, looking through the sump glass, with the growth light removed. The Green Grabber® strings are shown touching (and rubbing) the glass, and when bubbles are rapid this has the effect of cleaning growth off of the glass so that more light gets through.
This customer's HOG3 or 3x or 3xx in saltwater shows a combination of slime and green hair. The Green Grabber® strings have most of growth, and should be cleaned by scraping the strings with your fingers. The Green Grabber rock textures can be brushed in a sink, but don't brush the strings because your brush will get stuck in them.
For freshwater, the HOG models without strings are best because freshwater only grows super slimey Spirogyro species, and must always be brushed in your sink because it's not thick enough to pull out by hand. So by not having strings, you don't have worry about your brush getting stuck in strings...
Customer's HOG3 or 3x or 3xx scrubber® in saltwater showing green hair algae attachment to the Green Grabber® strings. Sometimes growth attaches more to the Green Grabber® rocks (slime does this) and sometimes attaches more to the strings, like this one. One note about this particular growth, is that it is very light green color, meaning it needs more iron (just like spinach). So you could feed more nori seaweed, or dose some iron, or just double your feeding.
Customer comments:
http://algaescrubber.net/forums/show...2x-HOG2-HOG1-3
Update: Since the Fusion 700 air pump is no longer available, the Danner AP-4 is now recommended for most scrubbers, except the SURF4 or 4x which can use a Danner AP-8, and the SURF8 which needs a large single-outlet pump.
Note that all HOG and DROP models have 1 air inlet, therefore the 2 outlets of the Danner AP-4 pump can be combined into 1 with a "T" or "Y" fitting, and this will give you a lot of air which can still be reduced with the control knob. If you don't want to combine the outlets, then the smaller Danner AP-3 pump has only 1 outlet, but it also does not have a control knob.
https://www.dannermfg.com/supreme-ox...lume-air-pumps
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