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Little space is needed for a HOG1 like this. This looks like a saltwater sump, so a HOG1 is too small for filtering, but it can grow food to feed. Only 1.5 inches (3 cm) of distance off the glass is...

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...

Two smaller HOG's instead of one larger one

Here is an example of two smaller scrubbers instead of one larger one; in this case it's two HOG1 scrubbers® on the wall of a saltwater sump. One...

New photos of HOG1 show black tubing. Also visible is the roughed up rim, which holds better to the glass.

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This looks like a HOG1 from high nutrient saltwater. After a few weekly brushings, the dark growth should start turning lighter, and the growth ring should fill in...

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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...

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Here's a customer's HOG1 or 1x in saltwater, although it's also fine with freshwater because is does not have strings. The growth should eventually spread to the sides after a few more cleanings.
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This is a customer's HOG1 or 1x in saltwater... you can't tell which one because the Green Grabber rocks are the same on both; only the lights are different (X mean Xtra led's) and you can't see how...

HOG1 gets unboxed and installed by Premium Aquatics:
https://www.youtube.com/watch?v=-oWedD-WWX8

"The HOG1 it's the same thing [as a SURF2] on a smaller scale, it depends on the amount of food that you distribute" -- Eric75003 on the RF site

"Implementing the [HOG1] was really easy. My water...

"[HOG1] is working incredible well. Went from constant algae outbreaks (3-4 per year), to no algae at all. 10 yr old 250 gal reef tank, started developing blooms at year 7. Nothing else worked, even...

"The algae scrubber [HOG1] is working great; is consistantly growing a nice batch" -- Morgan Kelsey

Also, here is a pic of Alessandro Tento's HOG1x:
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Pic from Thomas Rosdahl:

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Pic from Mlandscape:

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"Great looking device, great instructions, very very happy" -- Pygmey on the R2R site.

One year of running on FW:
http://youtu.be/Clw-zFrVU1s

"I love the [HOG1] and in the short time it was on the tank its positive impact was without question" -- Joseph Grillo

Is the growth black, and are the non-growth areas white?

Tuck the first tubing segment under each other, and open the segment further away. Also, tilt the whole unit.

18 hours.

I have not used one, but it's 2.9 watts and good for the HOG.5. However I've tried other 2.2w or 3.0w watt pumps and they were not enough for the HOG1. So if you can, get a larger Whisper, up to the...

The HOG1 is now available Here

Get the no-overflow advantage of an upflow scrubber: since it is ALL underwater, it can't overflow onto your floor.

The HOG1, with 24 square inches growth surface, magnets with 3X the holding...