L
Lost
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- 38
first post on this site! ...so don't flame me, lol
First, whoever wants to pump tank O2 directly into the waater, i'd be pretty concerned about two issues; one, such an approach might screw up your pH because straight oxygen is pretty reactive, and two the shit is seriously flammable. Imagine what might happen if you got your oxygen partial pressure too high in your growshow and the CO2 burner came on! Plants on da MOON, bro! Not pretty.
I believe in keeping things simple, which is why I'm on this thread to begin with. I am designing an RDWC (recirculating deep water culture) system along the lines of the undercurrent, but at lower cost. In the keeping it simple dept, I am considering the use of waterfall style aerators in the control bucket and reservior instead of airstones in every bucket. Thoughts? Also, where might I find an air venturi, since there are a couple places in my circulatory system where one might easily fit?
On to nutes- I am considering either Advanced Nutrients or General Hydro, as both of them purport to be pH balanced, and I don't have the coin to throw down on a lot of testing equipment right now. pH test strips is about as far as I'm able to go for now. Each 5 gallon bucket in my system will be about 3 gallons full, about 12 of them, and along with the 40 gallons or so in the res and the control bucket means a total water quantity of about 80 gallons, give or take. I want to be able to go three weeks between water changes, would accept two. what are your thoughts? Feel free to PM me.
thanks lost, good to be here. I'm just trying to save pump and hose costs, hassle, noise and complexity of having an airstone in every bucket. Since I'm moving a lot of water anyway, why not take advantage of it? If I can aerate with the circulation pump then why do I need a redundant system? I'm planning to run a 40-50 gallon reservior, so I think it would have plenty of volume.
The issue I saw with them when I checked them out was that the top spins I think. My concern is that the roots would get caught up. I have seen some cool current makers that upi could add a venturi (simply adding an air line into the line after the pump), and I think that done right that could work our well.
Yo lost, so you thinking about oahu huh :)
Hey if you are going to go no airstones, then keep the water levels super low. This will increase flow, because ou are going to need a ton of flow to keep up with the roots needs. Really think of it as a giant nft, and I would add sprayers to the res to keep the dangling roots moist.
Proof`s in the pudding bout air pumps and regenerative blowers we usedta use pumpin heat STRAIGHT to the rootzones , and folks just don`t understand when I tell em that bottom container temps can vary GREATLY from rez temps due to hot bubbles blastin up underneath a bigass rootmass on big plants.....
Thanks Medi for sharing a 27 degree difference from the alita 40 compared to ambient temps .....Now do ya`ll see how bottom container temps can cause total crop failure when rez temps seem to be within normal tolerances of 65-69 ?.......
That and lack of flow once rootmass has filled bottom containers is something that HAS to be addressed for any type of regular harvey with RDWC....
The way i see it is, think if you put a cup of water, gallon of water, and 50 gallons of water outside in the sun, the cup will get hot first, followed by the gallon, then the 50 gallons.Good shit man. I am adding a second pondmaster pump in on this run that's about to launch. I felt the ap100 wasn't enough to really get the dual micropore diffusers in the 5 buckets really going strong. I will try some temperature probe readings after the system is wet, and we can see more about air pump heat output with those pumps, and how it affects the individual buckets.
-TF
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