Keesje
Well-Known Member
Breaking the surface tension does not automatically add DO to the water.A question I've always had is if your using something like a halo to water your coco. Then when the jets of water hit the top of coco(breaking surface tension and adding DO), wouldn't that add all the Dissolved Oxygen one would ever need?
If that would be the case, one could also add a drop of detergent to the water.
DO gets in the water because of air pressure (the column of water above the surface)
By mixing/agitating your reservoir you re-new the upper layer of the water constantly. Replacing the upper layer which has lots of DO, with the water underneath, that has no DO. This constant replacing of layers will make sure that your whole reservoir contains DO rich water (hopefully)
And also as stated above: DO is only important for DWC and RDWC when roots are submerged all the time.
Otherwise oxygen in gaseous state is way more effective.