Fredwak
Well-Known Member
Well......the water would have to be warm so I guess there would be less O2....I have seen plants wilt during a nute change. It was so bad once that I lost a branch. Sounds wierd, but just one branch wilted so bad that I had to cut it off. But this was a situation of roots without water. I can't say how long it takes for O2 to migrate out of water, either through plant absorption or just coming out of solution back into the atmosphere. The volume of water plays a major role, as would the concentration of O2 held in the water to start with. Sidenote: water can only hold so much Oxygen. Its usually considered to be 10PPM, but there are variables that need to be controlled. The cooler the water the more O2 it will hold. You won't see 10PPMs at 80 degrees. Another factor is the quality of bubbles, or the action on the water that creates the bubbles. A membrane diffuser is much better than an equal size airstone. Some say a waterfall is the best of all. In saying that. A plant won't last long if your PPMs fall below 4 or so. So to answer your first question I have no idea. To answer your second question I have a question for you... your toes, or mine?