By that logic, I am assuming you think there is more oxygen in water than air... and that you think roots can respire in un-aerated water. Damn this is depressing. Please go read more. Plants aren't fish.
you don't grow in coco do you? if you did, you'd know that as a medium, coco coir provides great aeration to the root zone. so not only does the medium provide O2 to the roots but each watering adds more O2 to the root zone.
The only way watering coco adds more oxygen is if you had a completely saturated medium, to begin with. You are arguing that a glass full of water has more oxygen than an empty glass... My first and most recent grow were in coco. Most grows I have done consultation for have been coco.
let me ask it this way then as a potential customer:
Plant roots in coco or soil should be getting most of their oxygen from the air (all the tiny air pockets in your media also called soil pores) and much less from the water. This is why they usually put things like perlite in your coco mix and people stress not having compact media (which over-watering also contributes to). If you have mycorrhizae in your media, they also perform better when it isn't over-saturated. Hydroponic-based systems generally use things like air stones to provide air to the root zone... Do you know why? There isn't enough oxygen in plain ol' water to sustain optimal root health. Ideally, media should always be moist. Not completely saturated.
Yes, aeration. In other words air in the root zone...
You mean the air that the well-aerated media lets in... coco doesn't produce oxygen
so just to be clear, roots get oxygen from the water that you use to feed plants in coco. glad you finally came around to what i've been saying.
oh, and this...
I have a shiny penny for him, oh wait never mind we don’t have pennie’s anymore. Definitely isn’t worth a nickel.
It is just what the air pockets in your media is called. Just a horticultural term. It is the same thing as the aeration in coco that you explained.
Again... A quick search online could get you educated on the respiration of roots. It is basic knowledge that a tomato-growing grandma would even know. I have said multiple times, that you are correct about there being oxygen in the water. That is also basic knowledge. But, it shouldn't take someone smart to know that you need aeration in your media (i.e. air), and that a media fully saturated has less air. Move on, and get an education. Or just use the computer in front of you to get a better grip on how plants function.
you got it, boss!
Cough is correct. If you put a fish in collected distilled water it will die of suffocation. It's the O2 diffusing (diffusing is the operative word here) from the atmosphere into the H2O that provides the available O2 for a fish to breath. The O2 that's in H2O is a bonded, stable molecule and that stable H2O is not a free provider of H or O, it takes an external force for example, electrolysis, to release either. The reason people use O2 bubblers in their aquarium is to saturate the H2O with oxygen to give the fish the O2 they need; the surface area of the air on top of the water in a fish tank being insufficient to diffuse enough O2 into the water for the fish to live.
So you also agree. The act of watering coco adds oxygen. Do you think using a watering can adds oxygen? Do you think using a pump into a feed line above the coco adds oxygen? Seems weird both of you try to use fish to try to prove your point?
I thought dissolved oxygen came from exposing water to air? Air pumps do that by injecting air in the form of bubbles, but aren't there other methods of oxygenating DWC with waterfalls or "flooms" that just circulate the water and don't create bubbles?
Sometimes it's hard to determine what is ignorance vs sarcasm.
it most certainly does. the splashing of the water as it pours from the can hitting the surface of the coco creates dissolved oxygen.
thanks. that's exactly my point. these 2 think that's wrong.
that's wrong. adding feed water to a watering can oygenates it. water coming out of a feed line splashing onto coco oxygenates it.
