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    Final details: Undercurrent DWC pipe height?

    How much distance from the bottom of the grow site do you put the return pipe? (that goes back to reservoir) 2" in my case, using Uniseals.
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    How many water changes per hour for DIY RDWC Waterfall/Fallponics?

    We have seen conflicting information from multiple changes per hour to once every 1-2 hour. What is the target number of water changes per hour for a DIY waterfall / fallponics system (PA Hydroponics) to each grow site? What about for a DIY undercurrent system (like cch2o). Much smaller...
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    Missing the obvious? Why is a reservoir needed? If no space.

    We are planning to use 3 x Ikea Sockerbit totes instead of 5 x 5 gallon pails so they will be about 15 gallons each. One question came up, is there anything preventing from having smaller plants / herbs in the "reservoir" unit? (from where water is pumped to waterfall the others) All we see was...
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    Comparing the 2 main RDWC designs (waterfall, undercurrent)

    Experts or people with these systems, what do you like and what would you do differently? Assuming 4 grow sites with 5 gallon pails/buckets. Common pieces: 2-3 inch PVC pipes between the grow sites Air stones + air pump Water pump is inline and not submerged in the reservoir Main Differences...
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