Whats a good substrate for dtw

Discussion in 'Drain-To-Waste Hydro' started by bran1981, Mar 26, 2017.


    Stomper420 Active Member

    Coco is about trouble free hydro you can get, can be messy but if you take care it's not bad at all..love the shit

    visajoe1 Well-Known Member

    i use botanicare moisture formula, watering 3 times per day, DTW
    Stomper420 likes this.

    ssj4jonathan Well-Known Member

    Don't use growstones! They're loaded with lime, CaCO2, which ruins pH control. I've been battling pH swings from hell thanks to these rocks. Trust me, you don't want to be in the position I'm in right now. My plant looks horrible.

    I've been researching around and have come to the conclusion that neoprene sponge foam cubes are the best medium ever. They're sterile and 100% inert out of the box. No washing or stabilizing needed. Only draw back is you have to buy a roll and cut out the cubes yourself. Once I finally give up on these grow stones, I'm going to give them a try. Amazon neoprene sponge foam too see what I'm talking about. They come in varied thickness.

    bran1981 Well-Known Member

    I feel your pain with the grow stones lol. Im in the middle of my last flood and drain and used them. My ph swing is horrible, never again.
    ssj4jonathan likes this.

    since1991 Well-Known Member

    The ideal substrates for a run to waste.top feed drip system would be coco coir pots or slabs..rockwool blocks and slabs...or soilless peat/perlite mixes in pots.
    rkymtnman likes this.

    rkymtnman Well-Known Member

    i'm in the middle of my second run with dtw autofeed GH waterfarms. first grow came out perfect (knocks on wood)
    since1991 likes this.

    since1991 Well-Known Member

    How are you running to waste in a GH Waterfarm? Sounds interesting.
    rkymtnman likes this.

    rkymtnman Well-Known Member

    the sight tube that runs up the side of it. i cut it at the level where the top bucket meets the lower res, maybe an inch and a half above the line they put in the tube. set the timer on my pump to fill it up from top and it will keep filling until it starts going out the overflow tube. one feed per day usually about a gallon which is about 8 minutes on my timer.

    workded great last grow, no res changes in the waterfarm. doing the same so far on this one.
    since1991 likes this.
    Blue brother

    Blue brother Well-Known Member

    Fytocell is amazing stuff, can be hard to source depending on ur location though

    ugmjfarmer Well-Known Member

    Perlite/Vermiculite 50/50. Or Rockwool flock/cubes. Or Promix BX / Perlite 50/50, all work great.

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