subaquatic co2 injection

has anyone ever heard, or better yet seen this done. Ive recently moved and the growins on hold for the time being, but been readin, an read about using a co2 bottle with regulator and airstone intermittently in a dwc style (or any other where roots sit in the water) cant remember exactly what i read, but would be interested in tryin once were on again, ideas?

If your putting c02 in the water there will be less room for 0xygen, seeing as this is what roots need I dont see how it will help.

like i said cant remember exactly what i read but it was along the lines of co2 being absorbed through the roots, if say dwc then the air will be constant with maybe 30 second blasts of co2 every 10/15 mins

Again, roots dont absorb C02, the plant does, why not blast the plant with c02? Your trying to get as much o2 to your roots as possible.

Are you sure this wasn't pertaining to an entirely submerged plant?

^^^ yeah i think i read it some where while researching, and no not less o2 but intermittent co2 with the air pump still on maybe?, not sure really was drunk surfin lol, but im gonna give it a go once im settled in my new place cos i run dwc anyway ill keep ya posted

old stuff reguarding soil but could incorporate well to dwc imo

Aquatic plants absorb CO2 from underwater. Your plants will not, and they will not enjoy it if you start pumping your water full of CO2 bubbles. Stick to O2, and add your CO2 to the air that your leaves are breathing. They'll love you much much more.

What about if you have a dwc system and you get a Co2 bottle for the plants and then get an O2 bottle and put the line where your roots are?

I dont follow you...

You do not want CO2 pumped into the water, at all. If you can pump CO2 into the air for your plants, they'll absolutely love you. As for pumping O2 into the DWC system, I havent done it myself. The roots of the plant want O2, but I would venture a guess that you can overdo it also.

I always wondered how effectively you could oxygenate dwc water by feeding the pure O2 from a basic electrolysis cell to it directly.. Oxygen doesn't really like to dissolve in water beyond a few ppm, but if airstones work than that should work much better.. Ozone would be interesting to bubble through aswell.. I don't know if it would do more harm than good though, but if it harms nothing it could make H2O2 obsolete..

i run a fridge and have a huge overkill when it comes to exhaust for smell and heat issues (sounds dont mater cos old fridges are loud) id like to use co2 but in the air wouldnt work for me cos of my ventilation from what ive read it seems plausable ima try anyway when im back up and running ill keep y'all posted

Let me just reiterate what I already said, being that you do not want to pump CO2 into your water. Not only will it throw your Ph off balance, your plant should be absorbing O2 via the roots and CO2 via the above-water foliage.

Reference 1
Reference 2

If you will still be experimenting, I would be interested to see the effects on your plants. Not a risk that most would take, so I commend you on being willing to take that step...

Happy growing!

look up dosing co2 subaquaticly in aquariums, the ph will drop as co2 levels clib abd they doo so rapidly, so you would need to buffer the water and monitor the fluctuations over night and tru dark periuods and dose ferts on a daily or bi daily regimin e, just like aquatic plants// but the leaves probably will use co2 fatesr tehen the roots since it is adapted to terrestriall life.

Plants can fix co2 without light, but it requires an enzyme, ATP, and NADPH produced in the light dependant stages of photosynthesis..
From what I've read, you need high levels of CO2 in the air (not roots) to increase the productivity of the Calvin-Benson cycle, but the increase is most drastic right near the co2 toxicity level..
These same light independant co2 fixing pathways also take up o2.. Its called photorespiration, and its not that great.. Different sugars are formed, and these create toxic compounds that can actually inhibit photosynthesis..
I wonder if the co2 toxicity is related to the o2 though.. I wonder if you could supass the limits in an inert co2/argon environment etc..
A bit of a tangent I guess, I just wanted to point out that even the Calvin-Benson cycle occurred in the leaves where the ATP etc is..