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Thread: Various RAIN waterfall growth pictures

  1. #21
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    This RAIN4 screen has a giant growth ring which protects the center section from light-blocking and flow-blocking that often happens otherwise (see http://algaescrubber.net/forums/show...3-Growth-Rings )

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  2. #22
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    All other waterfall algae scrubber designs (which we created in 2008; see Ats2008.org) require you to disconnect and disassemble the unit to get to the growth on the bottom tray. This was a problem. The RAIN2 and RAIN4, which we created to solve this issue, allow you to lift off the LED dome lid with one hand so you can observe any growth on the tray, and then you can lift the tray off of the water pipe also with one hand (as shown) to take it to your sink. And you never have to turn off the water flow when doing this.

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  3. #23
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    One-handed removal of the RAIN2 (or the RAIN4) dome LED lid lets you get to the growth easily. In this photo, the water pipe is turned a bit so the growth is more visible. And now, with one more hand you can lift the tray and all the growth out, or remove the red cap and slide the screen out. Without turning off the water or disconnecting anything else.

    Answer to question: Because in saltwater, scrubbers absorb nutrients much faster than chaeto refugiums and thus can be about 5 times smaller; and for freshwater, chaeto does not grow at all (the only other option is plants)

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