J
J Henry
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When you yank the covers back on the plain truth, is low oxygenation ever really any problem for any grower?
They, are absolutely right. From what I've seen, you can't achieve too much DO. Though I've not measured mine, just going from observing the plants.They say having "plenty of oxygen" is vitally necessary for successful RDWC Hydroponics.
Yes, they mean plenty of DO, lots of it.Does "plenty of oxygen" mean "plenty air" or "plenty aeration?"
At the temps we operate the water at, seal level, optimal barometric pressure, no salt, 100% saturation = 9.1 mg/lHaving no luck finding anyone that has any idea what DO Saturation is really requires and necessary to sustain plants and microbes ( 2 symbiotic eco systems) throughout the total growing season…
100% is ideal20% DO Sat, 50% DO Sat, 89% DO Sat, 100% DO Sat….. What about 110% - 130% DO Supersaturation to guarantee, insure no possibility for the plants and the microbe colony to never to suffer low oxygen levels, environmental hypoxia, death and disease for the total growing season.
That's because it's much lower than what the plant needs. So if the plant is doing ok, the microbes should be ok.do not talk about the aerobic microbe's biological oxygen demand, the volume of oxygen required and consumed by microbial colonies in DWC,
Considerable isn't the word I would use. Billions of them are invisible to the naked eye. But they are also creating oxygen as they do their thing. So, if you have any amount of quality aeration, they should be fine.The little fellows are tiny, but many billions of them thrive and multiply hourly a healthy DWC's; out of site-is out of mind perhaps. They also need a considerable amount of oxygen too.
9.1mg/l I forget the conversion to ppm.So, does anyone happen know or have any idea what the optimum/ideal DO saturation is? The ideal number on wished for on the DO Meter that guarantees/insures a safe oxygenated environment for all the plants plus all the microbe colonies in RDWC’s?
If you are using any of the standard aeration tools sold nowadays you are unlikely to run into that issue.Question: If you test the DO Sat with a DO meter and discover you do have a serious low oxygen problem in your water, how do to fix this low oxygen problem in your water? Are do you do nothing and hope the problem simply fixes itself before everything wilts and dies or becomes diseased and dies….
If you have those test your water & post your setup/results....I'd love to see them.xygen analyzers and DO meters are always available for precise oxygen measurement that eliminates the hoping, guessing if there is really enough oxygen to sustain a healthy environment.
"Problem" is not the word I would use. But I think a lot of hydro growers are not getting maximum results. I have yet to reach a point where the water is too oxygenated.
Here is a chart. But basically, at the temps we operate the water at, at sea level, 9.1mg/ml is saturation point.
http://www.hakkoairpumps.com/subcat15.html
I'll tack my aeration setup at the bottom if you care to see how far I have gone, & I think it would benefit from more.
But to get back to it....I have a lot of oxygen....a lot...& I think if I were to add more it would be even better. Perhaps soon I would reach saturation levels of possible O2 in the water, but the infusion method would need to be updated. Meaning, Aqua lungs, do a much better job of dissolving the water, but I can't afford to run those in every bucket. Aside from the fact that they are so large. So, I think you could reach "possible saturation" points....but it would be quite expensive to get all that air infused into the water. Standard air stones don't do a good job of it.
So, I guess what I'm saying (I'm sorry, I'm waking up slowly today) is you could have enough air pumps to achieve maximum O2, but you would need to get that infused/dissolved into the solution, which standard air stones do very poorly.
They, are absolutely right. From what I've seen, you can't achieve too much DO. Though I've not measured mine, just going from observing the plants.
Yes, they mean plenty of DO, lots of it.
At the temps we operate the water at, seal level, optimal barometric pressure, no salt, 100% saturation = 9.1 mg/l
Here are two sites to give you an idea of what you are driving at. If you aren't going to read all of it, some basics are:
The atmosphere can hold different amounts of water vapor (humidity) depending on the temperature. That's why it's called relative humidity. The hotter the air, the more water it can hold. You probably know all that already.
Water is much the same, but reversed. Water can hold different amounts of O2 depending on the temp of the water. But the colder the water, the more DO it can hold. Salinity also has an effect, sea level, atmospheric pressure. You need to be above 5mg/l for average marine plants. Cannabis though, is not a natural marine plant. From what I've seen it will take all the DO you can throw at it.
http://water.usgs.gov/edu/dissolvedoxygen.html
100% is ideal
http://fivecreeks.org/monitor/do.shtml
That's because it's much lower than what the plant needs. So if the plant is doing ok, the microbes should be ok.
Considerable isn't the word I would use. Billions of them are invisible to the naked eye. But they are also creating oxygen as they do their thing. So, if you have any amount of quality aeration, they should be fine.
9.1mg/l I forget the conversion to ppm.
If you are using any of the standard aeration tools sold nowadays you are unlikely to run into that issue.
If you have those test your water & post your setup/results....I'd love to see them.
Here is what I'm currently doing...(my setup)
Right now, I have two of these.... (it's massive amounts of air, I can run my nail guns with it)
One of them I've split the output, to run two of these in the res. These things are awesome. They infuse the water with air...tiny bubbles. If I remove these from the system, the metabolism goes way down. I've noticed this because they are on a circuit that often trips. So, I've had many occasions where I look & the plants aren't eating as much. Then I realize it's because that pump is off. I'm aerating every bucket, the control bucket, & the res, & I think they would still benefit from more.
The other runs 16 of these in the buckets.
http://hydrobuilder.com/air-stone-6-15cm-case-of-12.html
Then I have two of these...
http://hydrobuilder.com/air-pump-with-2-outlets-7-8-lt-per-minute.html
Which runs two of these (each air pump is T'd to make a single feed) in the control bucket.
http://www.amazon.com/dp/B00VT3MSXY
The above air "stones" are much better than standard air stones in my opinion. The Aqua Lungs are the best of the best, but they take up so much room.
According to those sites I posted anything over 100% DO is detrimental...Super saturated DO solutions have been shown to be detrimental.
Root fungi will form a symbiotic relationship, attaching physically to the roots and assisting with the active transport, offloading some work from the plant roots. I prefer sterile solutions, no bugs for me!
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