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Compost tea PUMP?

Discussion in 'Organics' started by Greenthumbs256, Dec 1, 2017.


    Greenthumbs256 Well-Known Member

    Someone recently told me that the pump I had more than likely wasn't enough to make a good 3g compost tea. Here the pics and specs can someone tell me if I wasted 30 bucks on this crap? It has 2 separate hoses each with their own air stone and can be adjusted to how many bubbles CM171201-203425001.jpg CM171201-203451002.jpg

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    kratos015 Well-Known Member

    Don't quite understand why he'd say that personally, possibly because he has a 4 outlet one instead of the 2 outlet one? 4 outlet just means you can get away with using smaller airstones is all I really noticed. Just grab yourself larger sized airstones and clean/replace them as necessary and I really don't see what the issue is. As long as it can keep things oxygenated then you're good as far as I can tell. Back when I brewed teas I used a cheapo pump similar to that, paid $20 for it at Petsmart so it certainly wasn't anything fancy.
    Greenthumbs256 likes this.

    SchmoeJoe Well-Known Member

    It might aerate it fine but it won't agitate it enough to keep things from settling to the bottom.
    Tyleb173rd likes this.

    OzCocoLoco Well-Known Member

    It’s not big enough to the 5 gallons that you said you were brewing with it,at a bare minimum 128 gph or 2.1 gpm won’t provide enough aeration let inside your brew.
    It’s not about the amount of outlets but the volume needed to get dissolved oxygen content to around 11 ppm. The issue is creating the right environment for aerobic microbes to flourish and outcompete anaerobic ones. A few years ago people did say that a pump of that size would be ok but as more research has been done on different systems it was found that they just don’t do the job.

    A set up like this is would cost me around $50 in Australia so probably less in the U.S or U.K . Not only does it provide the right amount of dissolved oxygen but it is drawing water from the bottom and pumping it up to the top agitating the brew which helps release the microbes from the compost and prevents any dead spots forming. It can be pulled apart in a minute so can be cleaned properly unlike an airstone
    Last edited: Dec 1, 2017
    SchmoeJoe and Tyleb173rd like this.

    SchmoeJoe Well-Known Member

    That's a great design. I've been using the Tea Lab aact aerator.
    Tyleb173rd and OzCocoLoco like this.

    OzCocoLoco Well-Known Member

    I copied his bigger version for 50 gallons but I normally just brew 40 at a time ,it’s really simple to make.
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    Canadain Closet Gardener

    Canadain Closet Gardener Well-Known Member

    Not strong enough to do 3 Gal , I have the same one. I can still make tea but only 2L at a time. That's enough for my small grow at the moment.
    I would suggest this one or something similar as that's my plan.
    SchmoeJoe and OzCocoLoco like this.

    Gumdrawp Well-Known Member

    I use a smaller commercial pump I got used for 25 bucks, it's a bit loud but it works great. I need to build one of those tealab things though.
    Canadain Closet Gardener

    Canadain Closet Gardener Well-Known Member

    Decided to finally upgrade my pump :)
    Tyleb173rd likes this.

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