Teaser, preview DO measurement.
Some potentially interesting things already but just establishing the procedure and test variables at this point. Ordered a new LDO “cap” for sanity since the one I have is quite old. More to follow…
DO saturation percent:
I like graphs 
But - that one has me scratching my head just a bit. Why is the time arrow is going backwards? Is that an almost instantaneous rise or drop in DO on the right side?
Very intriguing!
Yes, creating the intrigue. 
I’m going to send you a PM because I’d like to ask you to take a look at something before I start getting deep into collecting data, if you don’t mind…
sure! I love being part of a secrete science conspiracy!! 
I am thinking about buying some of these to try.
@Viva_Mexico a few posts back we were discussing those
This would be a nice device to test as to the actual DO contributed by these. @Enstromentals also mentioned these. My head is not in the right place at the moment to spend several hundred for one unless I can be convinced the benefit outweighs the disadvantages. I haven’t found anyone having actually shared the DO results from these as of yet, so that would be useful information. Could be a very high contributor but then the elements foul up rapidly. Don’t know.
But, having said that, I did find this gem on RIU that supposedly is from the OEM,
''For some reason people think we have generated some excess hydrogen that could be explosive or harmful. The fact of the matter is most of the separated hydrogen is also re-absorbed back into the water because the molecule formulation doesn’t change, ( H20 ) however the DO level increases because we convereted it to a soluble gas. Yes some hydrogen will escape, but technically not anymore than if it was evaporating like your environment does now with evaporation. You have lots of evaporation going on in those rooms. Plus you may be adding Co2. So with that said, hopefully your concerns have been addressed. Even though we are using an electrolysis concept / science, no one has done what we are doing in horticulture. Mainly because we have patents on how we use eletrolisis and our designs doing so.
There are a lot of thing you can do with electrolysis. One is swimming pool chlorinators. But in that case the Anode / Cathodes are further apart. our patents are 25 to 60 thousands of an inch. Further will make chlorine if you add a lot of sodium chloride to the water (salt ). There are also ways to capture hydrogen in a more complicated design concept and thats what a lot of people find on the internet. Unfortunately no one has ever established a good method or product to do that effectively.
There’s even bloggers ( The University of Goggle ) who tell people that you can make our technology for $10. Good luck with that. The iridium that coats our Anode / Cathodes cost $900 an oz. Thats is a precious metal used for conductivity in your cell phone , laptops and now Led’s are starting to use that material and that has up the price. It used to be dubbed 9 the cheap gold ) It’s now just under the price of gold. 20 years ago many tower computers used gold in their circuitry. There were companies formed that reclaimed that gold.
Hoped this helped’’
Specifically, note the part of the quotation:
Yes some hydrogen will escape, but technically not anymore than if it was evaporating like your environment does now with evaporation. You have lots of evaporation going on in those rooms.
And, the spelling of the primary technology they are employing as “eletrolisis”.
Equating hydrogen gas with evaporation of water is absurd and is a big red flag. But, never the less, it would be something nice to test for the results.
this would be the unit I would need. for a 250 gal rez. Says $1999. If I could get a 2.8% increase in yeild it would pay for itself in the first harvest. If it were 1.4% in two harvests and .7% increase in yeild and it would still pay for itself in 6 months. Sounds good on paper.
That’s big. Are you able to measure DO? If you purchase one, myself and I think others would be interesting to see the effect. In particular, over time.
I’m curious, how are you currently aerating your solution?
no at the moment but I am looking in to getting one.
my system has 3 parts.
rez
controller tub
buckets
the rez has 250 gallons of solution I can still fit almost another 100 gallons. In this rez I have one 4 output airpump with all four lines in the rez. I am running a chiller so I have the return line above the water level 2ft when full and like 5 ft when low/empty. This stream of water is injected into the water creating more D.O. The same is true with the return line to and from the controller. The stream is always injected into the solution.
Controller tub has a airstone and the fill line is above water level to increase D.O right before the water enters the buckets.
Buckets are feed from the bottom so when they drain they pull fresh air into the root zone.
Thats my biggest issue with that tech as well - and thats not the only red flag, crazy, untrue thing they have said.
I cant decide if they are just completely ignorant of the science behind their tech or they are lying through their teeth. It has to be one or the other - or maybe both.
Either way, I want nothing to do with people like that.
That said - if @Viva_Mexico is willing to spend the $$ and record DO levels before and after installing one, I would love to see the results 
Just leave the lids off the rez and keep some fans going and the odds of blowing up your entire shop are going to be pretty low.
Probably.
I hope… 
Thank for the description. It sounds as thought you have a decent amount of aeration running already. For a very impressive system. From my personal perspective I’d opt to measure the DO, possibly borrowing a DO probe, of your current system as a baseline prior to adding additional equipment. But that’s just me (and sometimes I think backwards). Good DO probes are pricey so if you can find one to borrow first for a short period, that would be my recommendation.
Keep on eye out here, too. Larry has been helping to formulate a test to produce some measured results for what is going on in this thread. This include a comparison of fluming/flooming to forced needle wheel aeration as a first iteration. Some of the results may spur additional tests. It’s possible this may be expanded into additional aeration techniques at some point as well.
If you have some thoughts as to additional aeration type tests, please let me know. I probably won’t get to obtain an O2 generator to test in the near term since I’m, unfortunately, nearly my current budget. But sometime in the future, it’s possible.
Not sure if I’ve mentioned it here, but I did a quick and simple upgrade to the waterfalls in my RDWC tubsites and now I just don’t need any other aeration. I circulate the water with a pump in my control bucket. My chiller broke so I’m not using one at all. In the summer. Works great!
Pretty cool, man. I might try to gin up a test around this. I have some tests running currently so perhaps on a second pass.
Made progress overall on the build-out:
Some representative plots from the system during test:
Environmental (Red is in the tent, green is outside of the tent):
Solution:
Lights (1 of 4):
Things on the short term agenda:
edit: item 3 completed, here:
hehehe
Looking forward to the start of the grow and seeing how all that data plots out. I love graphs!! 
If you’re running close to 18kW of LED’s, no wonder your room heats up
That may be a tough challenge to handle without adding AC to the room - especially in the summer.
I cant run my puny 320 watt led in the summer at much over 60 watts without driving tent temps up into the 80’s. No growing for me until this fall after it cools off. About all I can do is practice starting clones
Good luck!
P.S. without pics, it didnt happen
P.P.S - Im jealous of your setup!
Haha. Thanks. No, not 18kW. I wish.
Total for the primary lamps are at ~2.4kW at the LED plates (all-on full spectrum). But, I don’t plan on running them full bore, either. Just for testing. Circuit is 15 Amps, need to upgrade that.
I’m going to add a loop onto the gycol chiller for cooling the environment and see how that performs…
Forthcoming. Do you want a pic of something specific?
Similar to what you are up to, lots of diy
Oh, and this is the second time I’ve seen the effect of local lightning on the readings. The sensors are isolated, so it has an interesting temporary effect on the solution charge balance?
Notice the two spikes from the PH probe:
Could just be noise coupled in somewhere but I only see this occurring on the sensors that measure voltage potentials. And, the ORP shows a disturbance that doesn’t look like noise:
Interesting.
I am a picture junky, so everything!
An isolated power system is ‘supposed’ to stop those types of spikes, but lightening is strange stuff. How close were the strikes? You may be picking up EM pulses in any loops? Thats just a wild guess.
Very interesting info though.
Yep, that is a good point. Those probes would be quite sensitive to any type of voltage differential. I would think that the voltage gradient to be essentially nil at the scale of the cabling. The lightning was not obviously close but there was an electrical storm moving through the area.
BUT,
from my understanding, PH probes register ~60mV change for each PH unit. Here, we see a spike of around 0.1PH which would then equate to ~6mV. ~10mV on the ORP.
So, yea, that’s a very small voltage differential and the math to calculate the voltage gradient is cumbersome so I’m not going to do it. You are very likely correct. There is shielding on the cables by the shield ground may not be sufficient. Thanks for the thoughts on this.
