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Thread: Various RAIN waterfall growth pictures

  1. #1
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    Various RAIN waterfall growth pictures

    Here we will post pictures of growth that other people have had with their RAIN waterfall 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

    Our first growth example is a customer's fully grown RAIN2 that has been lifted off the sump in one step (easily done one-handed). Just think how much disassembly and cleaning you would need to do with anyone else's waterfall scrubber (even though we invented those in 2008).

    This super thick, darker growth from high nutrients in the water is making good use of the very strong GEM5 lights. Also note how the textured bottom tray has held on to the growth (and even grown there) so that the growth did not fall out the drain hole. The next step of course is to just pull the red cap off and slide the Green Grabber screen out with one hand.


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    (the red cap is a trademark of Santa Monica Filtration, and the tray is patent pending)

  2. #2
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    Growth Rings to the rescue...

    The LED lamps in Santa Monica scrubbers (such as the GEM5 lights on the RAIN, and the sealed LEDs in the DROP) are strong enough to create "growth rings" on the algae attachment surface screens and rocks. Growth rings have darker algae growth on the outside of the ring, lighter growth on the ring itself, and no growth (just white surface) inside of the ring. This gives the advantage of self-adjusting ring size growth based on nutrients in the water, because the inside of the ring can handle higher nutrients (because of the stronger light) when the outside of the ring grows darker slime. And indeed, a common time to get growth rings is in high nutrient water, and, when the scrubber is fairly new. They may eventually fill in if conditions need it. Otherwise they just adjust in size.

    The white surfaces inside the ring (especially on a DROP) also provide for more reflection of light back to the dark growth areas. And for waterfalls like the RAIN, growth rings further help to eliminate dying of algae that often occurs on waterfall scrubbers when growth gets too thick in the middle and blocks light and flow from reaching the screen. The growth ring keeps the growth hanging on longer here, without letting go, because light and flow can still get to the middle.

    Growth rings require very strong lights, like the GEM5.

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  3. #3
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    Nice growth sequence of customer's RAIN2, which would be similar on a larger RAIN4. The growth ring starts in the beginning, and enables water flow and light to reach the middle of the screen so that the roots there do not die. Then the ring fills in once the user's cleaning/harvesting pattern keeps the growth from getting too thick.

    (the red cap is a trademark of Santa Monica Filtration).

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