Diffusing my Return - The Planted Tank Forum
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post #1 of 5 (permalink) Old 04-13-2015, 12:22 AM Thread Starter
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Diffusing my Return

I'm still in the planning stages for my 125 gal Discus tank...so I need some help regarding my return

I plan on a wet-dry sump rated for a 200-250 Gal tank. The return will be set to handle about 900 gal/hr (discounting the in line CO2 and UV units) with either a Mag 9.5/12 pump. I was thinking using about 4' of 1/2" (3/4" PVC pipe) with multiple 3/16" (5/32") holes randomly drilled throughout the length of pipe. Is this a good plan? Discus like slow moving water, so what would be a good way to diffuse the return?
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post #2 of 5 (permalink) Old 04-13-2015, 12:33 AM
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That's one way, which in my experience always ends up quite unsightly for bulk of drilled pvc in the spray bar.

Better I think to split the return to 2 1.5 or 2" outlets in clear fittings near water's surface, thus slowing the local flow and minimizing the bulk in tank, without adding all the pressure build up of a spray bar.
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post #3 of 5 (permalink) Old 04-13-2015, 05:36 PM
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Every time I think about tanks like this I always seem to come to a "waterfall"

Suspended for 30 days for being awful to other forum members
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post #4 of 5 (permalink) Old 04-13-2015, 09:59 PM
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In my 65 gallon discus tank, I've got a single 3/4" return line that runs around 700gph minus what ever I'm running through my cerges reactor which is T'd right after the pump and it returns some water back into the sump. I have the return splitting into a 3/4" locline Y and it goes into the tank via that. My flow is actually on the weak side and am trying to figure out how to get all my plants to sway from the flow. I would recommend loc line for any return. I have mine coming up over the rim of the tank and just the tips sticking into the water so you can't really tell they are there.
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post #5 of 5 (permalink) Old 04-13-2015, 10:12 PM
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+1 to lock line.


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