Leakless RDWC

Discussion in 'Hydroponics / Aeroponics' started by tbf, May 12, 2018.


    Airwalker16 Well-Known Member

    Here you are sir.
    IMAG0042.jpg IMAG0043.jpg inline pump keeps water cooooool as can be. No residual heat sitting in the res. There's no chiller on this one, but it sits on concrete. Also, flooming. IMAG0045.jpg each bucket has a line. IMAG0046.jpg IMAG0048.jpg IMAG0052.jpg
    ttystikk and fridayfishfry like this.

    Airwalker16 Well-Known Member

    I don't see why you'd even risk it being an issue.... These buckets were frosting buckets from my local grocery store. They were white. I spray painted them black with that rustoleum stuff I told you about. Sanding is a bitch but I wish I'd done it. A sand BLASTER BOX would be SO NICE for something like this though.

    I would make your system light proof before you start anything in it. Prevent a shit show before it even happens, man. H2o2 is great. I used 29% for the first year. But as long as you keep your water COLD and DARK, things will run smoothly. I assure you that.

    fridayfishfry Well-Known Member

    All my greenhouse/outdoor YouTube home slices use white buckets.

    Every black outdoor bucket DWC I've seen comes with brittle leaves from plant heat exhaustion.

    To your satisfaction I've always used black buckets for indoor growing.
    Michael Huntherz likes this.

    fridayfishfry Well-Known Member

    Instead of chiller I could partially bury a 55 gallon plastic drum to cool the water. 6 ft under the soil is 50°F year round. So how deep is it 65°F? Airwalker? Bueler?
    nonamedman420 likes this.

    Airwalker16 Well-Known Member

    Oh snap this is going OUTDOORS?! I see your reasoning then.
    Michael Huntherz likes this.

    Airwalker16 Well-Known Member

    Hm. I'm not really sure... I'd try 3ft?
    So you're just going to circulate the water down into the res and pump it back up or what?
    Michael Huntherz likes this.

    fridayfishfry Well-Known Member

    I'll post pics of the whole thing.
    It's half built and I took a lot of breaks for mid-build replanning.

    x10 buckets 4 gallon
    x10 buckets 2 gallon as netpots
    x2 totes 40 gallon reservoirs (60 gallons true together)
    It's a one-way flow, the water will just be flowing counterclockwise pumped from tote to tote.

    2 rows of 5 buckets connected at one end and a tote per row at other end.

    You'll see

    The underground reservoir idea is to replace a tote with buried drum.

    Pump would be at bottom of drum where it's cold. Return would be at ground level and would flow into the drum.

    I could just get a lot of tubing and bury it.
    nonamedman420 and Sour Wreck like this.

    fridayfishfry Well-Known Member

    Tote goes where the blue tub is
    Receiving tote goes where the green sprayer nozzle is next to the saw.

    Kelp brewing

    fridayfishfry Well-Known Member


    fridayfishfry Well-Known Member

    IMG_20180531_171045-816x612_crop_592x489.jpg IMG_20180531_185424-816x612.jpg

    Attached Files:

    Last edited: May 31, 2018

    Lordhooha Well-Known Member

    Michael Huntherz

    Michael Huntherz Well-Known Member


    Keesje Well-Known Member

    I really like your system and your roots look very healthy.

    About the inline pump, I wonder if it makes a huge difference if the pump is in or just above the water.
    The water that flows through the pump is also meant to cool the engine.
    So water that comes in at one side will leave the pump a tiny bit warmer at the other side.
    The heat that leaves the pump via the air, will heat up the air a tiny bit. This air will also heat up your water and system as well.
    It are all little bits of course.
    The law of Conservation of Energy says that energy (heat) remains constant in an isolated system.
    Let's say your growroom is an isolated systems.

    Of course there might be a chance that the warm air looses some of it's heat when it touches the walls.

    Did you ever measure for a longer time if the water stays cooler when you have your pump above?
    And also what the difference in temperature are in the air.
    I am really curious, because I like your set-up and thoughts about it.

    Airwalker16 Well-Known Member

    It's a constant 73-74*F
    ttystikk likes this.

    Keesje Well-Known Member

    Ok, but what would it be if you would put your pump in the reservoir?

    fridayfishfry Well-Known Member

    If the water warms it becomes what is called hyperoxygenated this makes more oxygen available.

    Cold water holds more oxygen, when it warms, it lets off oxygen eventually but remains hyperoxygenated for a time.

    Purpsmagurps Well-Known Member


    Airwalker16 Well-Known Member

    Much hotter. The motor isn't sitting in the reservoir man. You gotta understand that the water is simply going through a propeller and up the tube.it's barely in contact with heat like you say. Submersing it is what heats things up. The motor for the propeller gets quite hot. I'd say itd be in the 80's.
    Keesje likes this.

    oill Well-Known Member

    Use large low wide containers with many sites then have less joins

    SmokeyMcChokey Well-Known Member

    This. For instance I came back from vacation and my pump just decided to vibrate out the little plastic hose fitting that goes to the pump outlet. The stream went up and out the hole for the out hose and airlines. No matter what you do it's going to find a way to spill or leak at some point just be ready to deal with the issue
    JSB99 likes this.

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