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 many led's there are. Also, this is not packed green hair algae, and it is not black slime; it is somewhere in the middle... sort of a light green slime which still absorbs nutrients out of the water as long as you harvest it by brushing it out in your sink. Overall it's a compact little area to keep algae in, so less algae grows in your tank.

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