hey @MIMedGrower
thanks for that plant link.. its little over my head when they start throwing out math and shit parts of the plant iv not learn yet.
but its still easy enough to get the point they are trying to make.. so it works.
i liked this bit here:
"Did you know that roots can take oxygen from the water for respiration, although not as much as from the air? Therefore, it is important to water plants until you obtain some leachate (15-30% by volume is recommended) as this will flush out old stagnant air and exchange it for fresh oxygen. Another factor to consider is the substrate's temperature. As temperature in the root zone increases, the oxygen concentration of the water decreases."
i would not of thought of a flush has also pushing out old oxygen . i know something stupid simple.. but made my light bulb go, doh!
eyes still all over the place, so i aint looked at the book yet. just poking around the webpage you mention.
bowl up!
chris.