hey df. i had a lengthy conversation with a lab tech from enviroside. they make industrial strength organic hydrogen peroxide products for big agriculture or food industry. so we where talking about using chlorine verse hydro peroxide based products to sterilize drip lines an reservoirs or sterilizing mediums before or during use. Bioside 15% or peragreen 22% are a few of their products. Zerotol is a watered down rip off compared to these products.
in that pm i was stating basically that calcium deficiency, an over chlorination will do the same spotting. till what degree of damage to the cell is the question. they both damage the cell and the tissue dies off. we see it as brown dead spots on the leaf. Sucking bugs can damage an leave behind pin size rust spots too, same idea, dead cells. the chlorine is unstable in the leaf cell an evaporates off basically exploding. or atleast thats how it was explained to me.
the hydrogen peroxide products wont be absorbed like chlorine.
when using tap, the chlorine strength at the time you water in, and the amount of organic or bio activity in the medium will vary how much chlorine will get absorbed. so the amount of chlorine that can enter the plant has huge variables before it even reaches the roots. most of the time it wont.
atleast thats what was explained to me. hoping im not spreading any false info.
now those cuts where rinsed in a light bleach solution, so they had direct access to higher then normal chlorine levels. no medium, no roots, it has direct access, the chlorine could easily be absorbed foliar.
