HotWaterKarl
Well-Known Member
I have been having problems with my indoor grows, doesn't matter if I grow in soil, RDWC, Ebb and Flow whatever, I always get the same problem with this leaf necrosis at some point in the grow. Doesn't matter if I use bennies, or chlorine, organic nutrients or mineral nutrients. Happened to about 12 different strains in all different media in every grow here.
I am on well water and treat my water first with a water softener and then I RO it. My RO PPMs are very low around 10 PPM. I always add calmag, and any nutrient I use contains micronutrients as well.
I got to thinking that this could be an excess instead of a deficiency, or possibly a deficiency brought on by a micronutrient toxicity. Using this chart, I found it most resembles manganese toxicity (from what I can tell):
http://loudclouds.co/wp-content/uploads/2016/07/marijuana-deficiency-chart-jorge-cervantes.jpg
Interesting thing about manganese is that it is soluble in solution so it will pass right through RO filters unless it is precipitated out of solution into a solid, by the use of ozone for example.
So now I am having the well water go through the softener, then RO, and then I Ozonate the water using a sumppump next to an ozone airstone, and then after I let the ozone deplete from solution I am using an activated carbon filter as the final step.
I hope this is going to solve my plant problems, and I'm posting this here for anyone that might be interested or have the same issues, also for any feeback anyone has on my issue. I have gone through the same issue in multiple grows (soil, DWC, ebb and flow, organic, mineral etc.). It's always the same issue.
My thought process is the ozone will precipitate as a solid in the RO solution anything that doesn't get filtered out by the RO (even if it is not manganese), and then those particulates will get caught in the activated carbon filter. One thing I did notice is the ozone alkalized my water, bringing the RO PH from 6.0 to 7.6 even after the Ozone had dissipated (about 30 minutes). And this Alkalinity stays in solution. I used to have to add 15-20 ml 20% PH up after adding my nutrients, now I add 0.5ml PH down!
This is my current grow at about week 3 of veg:
.
This is the leaf necrosis that starts at the 2,3,4th inter-node on the plants (from the top down).
And this is the bottom of the plants, they don't look bad down there at all:
I gave them their first flood with the new solution last night, and I might be dreaming but they seem better. I also have been foliar feeding with the new solution. Thanks for any feedback.
I am on well water and treat my water first with a water softener and then I RO it. My RO PPMs are very low around 10 PPM. I always add calmag, and any nutrient I use contains micronutrients as well.
I got to thinking that this could be an excess instead of a deficiency, or possibly a deficiency brought on by a micronutrient toxicity. Using this chart, I found it most resembles manganese toxicity (from what I can tell):
http://loudclouds.co/wp-content/uploads/2016/07/marijuana-deficiency-chart-jorge-cervantes.jpg
Interesting thing about manganese is that it is soluble in solution so it will pass right through RO filters unless it is precipitated out of solution into a solid, by the use of ozone for example.
So now I am having the well water go through the softener, then RO, and then I Ozonate the water using a sumppump next to an ozone airstone, and then after I let the ozone deplete from solution I am using an activated carbon filter as the final step.
I hope this is going to solve my plant problems, and I'm posting this here for anyone that might be interested or have the same issues, also for any feeback anyone has on my issue. I have gone through the same issue in multiple grows (soil, DWC, ebb and flow, organic, mineral etc.). It's always the same issue.
My thought process is the ozone will precipitate as a solid in the RO solution anything that doesn't get filtered out by the RO (even if it is not manganese), and then those particulates will get caught in the activated carbon filter. One thing I did notice is the ozone alkalized my water, bringing the RO PH from 6.0 to 7.6 even after the Ozone had dissipated (about 30 minutes). And this Alkalinity stays in solution. I used to have to add 15-20 ml 20% PH up after adding my nutrients, now I add 0.5ml PH down!
This is my current grow at about week 3 of veg:
.
This is the leaf necrosis that starts at the 2,3,4th inter-node on the plants (from the top down).
And this is the bottom of the plants, they don't look bad down there at all:
I gave them their first flood with the new solution last night, and I might be dreaming but they seem better. I also have been foliar feeding with the new solution. Thanks for any feedback.
Last edited:
