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Hydro Growers May Appreciate This

PigSquishy

New member
I have been actively looking for some scientific information in regards to hydro growing for quite awhile, and I finally found it... thus I am going to share it here perhaps NebulaHaze will find this useful as well and put it some place for others to find as well. I will post the link to where I got this following information at the bottom of it... I have been seriously looking for the O[SUB]2[/SUB] saturation level and the time needed for complete water recirculation in hydro a very long time, as well as can you inject pure O[SUB]2[/SUB] into the water instead of air.

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“There are communities of beneficial microorganisms that become established in the pond water that naturally suppress root diseases,” he said. “Even with the establishment of the beneficial microbes, growers need to maintain the dissolved oxygen level to near saturation (about 8 parts per million O[SUB]2[/SUB] at room temperature) in the pond water to keep the plant roots and beneficial microbes actively growing.

“Growers can bubble in air or can inject pure oxygen into the water. It is also important to circulate the pond water so there is a uniform gradient related to temperature, pH, fertilizer and oxygen.”

Mattson said the Cornell University Controlled Environment Agriculture group found good plant performance in a 1,500-square-foot pond where water was recirculated and distributed through manifolds in the pond. Pumping capacity achieved a complete water recirculation exchange every 12 hours.
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http://urbanagnews.com/blog/monitori...ction-systems/

I can't believe it he actually explains why the bio-film occurs in hydro when you use organic nutrients and explains why in turn it gave me a ton of root issues because I tried it at one point. A worthy piece of information for the hydro growers, and I hope others get as much from it as I did.
 
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Water Farm directions include adding a bubbler to the nutrient solution. I use 4" diameter stones. Oxygen is antimicrobial and raises pH over time. Sometimes pH can range 1-2 points in 3-4 hours.
I monitor that at least three times a day. And am often adding .25 to .5 gallons of water a day to maintain nutrient level.
The article is about NFT but still has interesting information.
Thanks for posting.
 
I used to think oxygen raises pH because of what I see, but I have been doing experiments where I just use tap water and let it sit, versus having it oxygenated at a very high saturation rate. Thus I have noted like you said that the pH does seem to climb higher and faster when adding the oxygen to it, but either way, even water that is just sitting there in 24-48 hours still seems to climb in pH values. I have pondered and questioned all kinds of things being the pH Down, my meters, etc... as I have continued trying to figure this out. Thank you for that clarification for me.
 
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