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cheap HPA pump

Discussion in 'Aerogardeners' started by BobMoses, Feb 16, 2016.

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  1.  
    LarsVegasNirvana

    LarsVegasNirvana Member

    I'm prepared to find my entire reservoir in the bottom of my tent one day. It's only 10 gallons.
     
  2.  
    Atomizer

    Atomizer Well-Known Member

    Good quality mechanical relays will last for a year or so with hpa, you`re only looking at 500 cycles a day. You might get a couple of months out of them with AA.
     
  3.  
    LarsVegasNirvana

    LarsVegasNirvana Member

    Well maybe I got lucky and one of mine failed early. :)
     
  4.  
    Atomizer

    Atomizer Well-Known Member

    If it was a Songle branded relay, lucky would be getting a week out of it :)
     
  5.  
    pinner420

    pinner420 Well-Known Member

    I was hoping to find a build thread for the ultimate hpa 4 - 8 site and capable of doing trees.
     
  6.  
    LarsVegasNirvana

    LarsVegasNirvana Member

    If you want to grow trees in aero you're going to need a 8 foot tall root chamber. It generally needs to be deeper than the plants are tall. That's why I do a v-scrog.
     
  7.  
    Atomizer

    Atomizer Well-Known Member

    Trellis the roots to cover the area at the top of the chamber. A 4x4x2 deep has the exact same volume as a 2x2x8 deep.
     
    LarsVegasNirvana and pinner420 like this.
  8.  
    pinner420

    pinner420 Well-Known Member

    That's certainly a limiting factor. any good builds you would suggest?
     
  9.  
    freddy42

    freddy42 Member

    I dont know why I shouldnt thinked about it earlier (ip water resistance ). so these two sensors + that solenoid valves and flow meter would be enough ? what would I need for the programmable light switch schedule and dimming ? Thank you very much for the tips I would look for those relays and I really appreciate that you would be uploading the whole script on github. @lars One more question, you mentioned that you are doing v scrog and that you need the chamber to be 8ft deep. If I decide to do sog + most importantly keep mothers in aero and would use root trellis, would less deeper root chamber be enough? Anybody got diy idea for root trellis? I only saw multiponics selling them, but the shipping is too high to my country, my idea is to substitue trellis with the sieve which is used when people are making plaster coating on the wall. I, I dont know how the thing is called, but usually its white, its also used as diy window mesh/screen and it should be maded from nylon. the only image of it what I found is this :
    http://i00.i.aliimg.com/photo/v0/1206321268/Nylon_Mosquito_Netting_Nylon_Mesh_Nylon_Window.jpg
     
    Last edited: Dec 11, 2016
  10.  
    Atomizer

    Atomizer Well-Known Member

    A fine mesh will encourage the roots to form a dense root mat at the top of the chamber. You just want a coarse (open) support structure to guide the roots where you want them to go. It can be as simple as cup hooks screwed into the underside of the chamber lid that you can hook the roots onto as they grow long enough to reach.
     
    Last edited: Dec 11, 2016
    LarsVegasNirvana likes this.
  11.  
    freddy42

    freddy42 Member

    @Atomizer So you put cup hooks there as a suport and roots on them so you lift them a little bit and spread them how you want, do you think that mat I posted is bad idea or not to fine mesh? Would you post a pic on how do you do it ? Thank you very much
     
  12.  
    Atomizer

    Atomizer Well-Known Member

    Unless your growing tree`s, which need a long veg and place limits on the chamber height, there`s no need to trellis the roots.
     
  13.  
    freddy42

    freddy42 Member

    I was asking because of mother plants.
     
  14.  
    Atomizer

    Atomizer Well-Known Member

    Why do you want to keep mothers in hpa?
     
  15.  
    freddy42

    freddy42 Member

    fast growth, regrowth:-D:mrgreen: :-D do you have better idea?
     
  16.  
    Atomizer

    Atomizer Well-Known Member

    It`d be quicker and cheaper to run additional mothers ;)
     
    pinner420 likes this.
  17.  
    freddy42

    freddy42 Member

    you mean like in soil ? can you elaborate on that little more?
     
  18.  
    freddy42

    freddy42 Member

    I wanted to edit this post but it was not possible because I did it once before, it wont let me do that anymore.
    I was checking out the some expresso machines, with that pump, It was pretty loud, probably not loud as chinese pumps but still I would want to minimize the noise as much as possible, do you think it would be possible to do that by adding pads from sorbothane or silicone ? and adding the whole pump to some kind of insulated box ?
    Do I need the pressure relief valve incase pressure switch fails plus a pressure regulator ? anything more ?
    Thank you
    @LarsVegasNirvana
     
  19.  
    LarsVegasNirvana

    LarsVegasNirvana Member

    Yeah it makes noise, but like I said you want to be able to hear it. If it's not running, or if it's running constantly, you definitely want to know about that. Your best bet is probably to use some kind of rubber mounts to hold the pump, and then wrap the whole thing in soundproofing foam. All I use is a little piece of seat cushion foam and then I shove the pump, foam, and accumulator into a little plastic box.

    I sleep in the same room as my grow and the pump never bothers me. Those chinese pumps are so loud you will be able to hear it outside your house halfway down the street. You'll see.
     
  20.  
    LarsVegasNirvana

    LarsVegasNirvana Member

    Who said anything about a flow meter? They're too inaccurate to use for anything useful. I don't even know what you think you'd use it for.

    For the dimming function you just change the output voltage of an analog output pin on the arduino and plug that into the driver instead of a potentiometer.

    I didn't say I needed the chamber 8 feet deep. I said you would need that if you wanted to grow trees. My last chamber was 1 foot deep, and my new one is 2-3 feet deep.

    My idea for a root trellis is to just hot-glue some really fine mesh (like for screen printing) at the bottom of the chamber, not the top. That way if any roots make it to the bottom they won't touch any pooling water and they will maintain root hairs instead of turning into DWC roots. I haven't tried it yet because I'm waiting to see if they even reach the bottom of this new design first.
     

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