What are your thoughts on heavy aeration in R/DWC?

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airedog

airedog

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In both my DIY and UC RDWC systems i've been a fan of heavy aeration, usually running an EcoAir 200 air pump to drive large Boss Hog air diffusers. At the end of the grows i'd have to cut the diffusers out of the center of the root mass as the plants picked them up. In my current start-up Tote A has air stones that while supposedly getting an equal amount of air, don't have the bubbling of Tote B; nor do the plants in Tote A have the size of those in Tote B. Each tote is getting 50 lpm through 2 * 8" diameter stones.

I can only find a few of my old Boss Hogs and they need to be cleaned and sanitized before i'll use them again. I'm thinking 1 10" Aquascape EPDM cylinder in each bucket and the epicenter as well as the top-up res, driven by 250 lpm from a couple of Hiblow pumps. That will allow an almost aeroponic zone below the netpots. Time will tell if the roots will lift those suckers off the bottom of the buckets. I'll use an Alita 40 to feed those airstones in my 2 * 44 gallon Brute R/O res.

Anyone have similar experiences or opinions on heavy aeration. I know that conventional wisdom holds that beyond a point more aeration should not matter; i just haven't seen that happen in my totes or buckets yet.

Kandy Kush in a 17 gallon tote;

KKrootsM3 (1).JPG


DIY res;


NuteRes.JPG


Tote B;

Diffuser.jpg
 
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PK1

PK1

IMO in rdwc aeration is not as important as circulation. You can alway have a bit of gap between the outlet and the rez water so that the water can break the surface and because of the drops there will be air mixed with the water. ex: in nature you see waterfalls and such. You don't see any air bubbles in rivers neither. however, your setup looks good
 
Onelow1

Onelow1

Yes you can over aerate. Seedling don't like too much action. And as PK1 said water falls work really well. A little of both is cool. Keeping distance between pump and water helps a lot with temps, feel how hot your manifold gets. big pump, big heat.
 
airedog

airedog

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Here are some Cherry Noir at 35 days; there's a Hiblow 100 lpm air pump feeding 2 * 8" sintered air diffuser discs in each tote. Much less heat than when i used similar EcoPlus pumps, usually running 68 - 72F and the totes have about 10 - 20L of water each.

Totes 35.jpg


roots 35.jpg
 
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Onelow1

Onelow1

If it's working, don't mess with it. It looks great. White roots, speak volumes! Will have to throw away my pumps and air stones some day and just use waterfalls. Surface area.
 
Bean_Boy

Bean_Boy

I agree with @Onelow1 with the seedlings, ive had roots get tangled and messy looking. But after that, it seems like the roots love lots of air. In my limited experience
 
Onelow1

Onelow1

.75 - 1.5 LPM is what CC recommends, no more. Personal, I like to start off small, increase around week 4 if your have explosive grow. Increase again later depends on how big and how long they'll be around. Look into water falls. What's the rule about air pumps...... They don't put air in the water, air bubble increase surface area.
I agree with @Onelow1 with the seedlings, ive had roots get tangled and messy looking. But after that, it seems like the roots love lots of air. In my limited experience
 

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