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Example of good amount of water flow coming off the Green Grabber® screen on a RAIN2 scrubber® waterfall. Flow this strong is not essential, but you do want the water flowing off of the whole screen from end to end.

Feeding time :)

Customer's Green Grabber® screen from a RAIN2 waterfall scrubber in saltwater. The closeup shows the Rough 3D (tm) printed 2mm thick screen (rough on both sides) that comes with the RAIN2. You can see the tiny threads that go inside the screen holes; these help hold on to growth, especially...

October 9, 2020: Stock update from Santa Monica Filtration: 1 - RAIN4 2 - RAIN2 with 4 GEM5 lights 1 - RAIN2 with 2 GEM5 lights 0 - RAIN2 with 1 GEM5 light 2 - Pole Mount for RAIN2 2 - HOG3xx 2 - HOG3x 6 - HOG3 4 - HOG2x 2 - HOG2 1 - HOG1.3 15 - HOG1x 13 - HOG1 11 - HOG.5 0 - SLIP.7 coming...

Yep, waterfall style R2D2ATS ! Maybe used beneath the metal

Yes this is normal. Just let it fill in. More info: Growth Rings The usefulness of "growth rings" (which are sometimes called bald spots) was not fully understood until recently, and in the past were avoided. But it turns out they can be a beneficial tool especially for waterfall scrubbers...

Can anyone guess

Metal cans are OK for freshwater and fish-only saltwater systems, and they block all light from escaping, so this customer made a nice DIY waterfall scrubber with 4 of the GEM5 lights in a can, and a mirror on the lid to reflect light back down.

Brown usually means need more light

Yep. Or feed more.

Customer's SURF2 or 2x scrubber® in saltwater, where he put mustard on the algae before eating. Actually, the yellow is just lack of iron, or too much light, or lack of bubble flow. Anyway it needs cleaning down to the white Green Grabber® white strings and rocks. He can feed more now, and...

Anyone want to guess what you can add to the water to get the yellow growth to grow darker?

SLIP.7 setup for chaeto with bubbles, bottom fed Neat trick for saltwater: Grow chaeto first, then turn on air bubbles to grow slime, GHA, or cyano on the chaeto, then harvest all of it together. Use a small water pump and air pump for the bottom of the SLIP.7 which then slips down into...

SLIP.7 setup for upflow only (saltwater or freshwater), top fed Use a small air pump to air into the top of the SLIP.7 which then slips down into the back of nano AIO back compartment sumps. Dimensions: 9 inches tall (23 cm) 3 1/2 inches wide (9 cm) 1 3/4 inches thick (4.5 cm) Not shown is...

SLIP.7 setup for waterfall only (freshwater or saltwater), bottom fed. Use a small water pump to feed into the bottom of the SLIP.7 which then slips down into the back of nano AIO back compartment sumps. Dimensions: 9 inches tall (23 cm) 3 1/2 inches wide (9 cm) 1 3/4 inches thick (4.5...

SLIP.7 setup for chaeto only (saltwater), overflow fed. Using the overflow from a nano display, to feed into the top of the SLIP.7 which slips down into the back of nano AIO back compartment sumps. Not shown is the GEM5 black shade screen inside. Dimensions: 9 inches tall (23 cm) 3 1/2...

SLIP.7 basic intro video:

The new SLIP.7 for nano back compartments. It can be operated in these combinations: Waterfall algae scrubber for up to 0.7 frozen cubes of food a day. - Fed from top water tubing - Fed from bottom water tubing - Fed from display overflow into back compartment Chaeto reactor for...

I mean, the Cladophora sp. is attaching to the clear acrylic surface...

This is Jim Stime's customer's outdoor sump with a SURF4x (also has a HOG3 or 3x or 3xx) that has been growing a bit too many days and needs a harvest, and also a good brush cleaning of the light. The growth tends to seek out the light, and in this case can attach (somewhat) to the acrylic. Like...