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Thread: Various upflow growth pictures

  1. #271
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    Not spaghetti and meat sauce. Looks like a modified HOG3 or 3x or 3xx scrubber that needed brushing out (in a sink) a week ago. Slime it still good though...
    http://algaescrubber.net/forums/show...he-best-filter

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  2. #272
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    This SURF4 or 4x (or half SURF8 or 8x) shows the strings circled around 3 of the 4 holes where the upflowing air bubbles come up (red arrows). This demonstrates how the air bubbles create vertical pathways for light to shine down deeper into thick growth, which cannot happen with waterfalls.

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