Here we will post pictures of growth that other people have had with their upflow scrubbers. Don't forget to go to the last page of this thread, to see the new photos. To be notified when a new growth photo is posted, subscribe HERE (must be logged in), and select "Notification Type" to be "Instant Notification By Email".
This first photo is of a customer's HOG3 or 3x or 3xx with really high nutrients in saltwater, which causes the dark growth. And the top part was out of the water, which acts as a bubble and salt-spray remover.
HOG scrubbers, because of the large vertical wall of Green Grabber rock surface, holds onto slime better than waterfall screens, and so can pull out nutrients in very high nutrient water when waterfalls would only grow slime that falls off.
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