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This is my old scrubber, inside a Oceanic model 75 trickle filter. The two tank stand was all built in the last 6 months. Still have some things to do.Click image for larger version

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The sump is for the middle 75 gallon and the 30 gallon cube, (The fish Hatchery). On the bottom.
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This is the pre filter box. It has a sluice tray that will push the bigger solids out of the water flow.Click image for larger version

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This airlift is my tanks central vacume, all the solids will end up here eventually. I use a turkey baster to blow out the corners. The substrate is very fine sand, maybe 3/8" deep. It will turn black ,H2s pockets if not disturbed regularly.

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The scrubber, hangs on a lip with ss steel hooks.Click image for larger version

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Plumbing it in, was the hard part, The scrubber has two 3/8" siphons pulling unfiltered water from the weir part of the W/D.
The hoses fit inside 1/2" hose easily. Which fits 3/4" heavy wall pvc. Nothing is glued, easy to modify.
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The Gem lights are suctioned to the glass, I cut a mirror that slides down between the cups. And 3 sides are mirror.
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The hose on top, is the return from the 55 gallon water chiller in the basement, which also serves as a water changer, tank refiller.
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The hatchery. Allows room for 3 different groups of fry, I am probably going to put a scrubber in here also.