phxazcraig
- 543
- 93
I've been watching my runoff EC all grow, and until flowering, it was always quite a bit lower than input.
Until I hit flowering. Why?
Now, despite adding longer watering times to get perhaps 40% runoff, my EC is 600 higher than input - hit 2000 for an input of 1450 last night.
I'm growing in coco/perlite, 5x daily watering. Plants just finished 4th week since 12/12 flip, and they generally look very healthy. When the EC started rising I noticed a small bit of tip burn.so I backed off on EC for a week, and the tip burn went almost all the way away, but not quite. That was an EC over 1200 or so. But after a bit of a drop EC still went up. When it hit 700 points higher than input I added more time to each watering, to get 40% (or more) runoff. EC dropped for a bit, but now is rising again. Last night I threw some RO water into the reservoir to dilute EC to 1200, and EC dropped 100 points today. This crop has done well on lower EC, so I think maybe I'll just keep it lower.
In the meantime, let's speculate, unless you know what's going on here.
I changed a couple of things when I flipped to flower. Around that time I started putting H2O2 into the reservoir. I also changed the nutrient ratio (per GH mid-level charts) and I started using Floralicious and Liquid Koolbloom. The LED power has been OK or a bit high throughout. I kept PAR above 700 through final veg and am up to 1000 or more now, because of plants crowding the light.
I'm wondering why the EC keeps building in two ways:
1. Something in the nutes is not being absorbed and is building up. (I'm wondering about Floralicious). Also note flushing out much.
2. My plants are simply not eating the nutes like they were before they lost 6 hours of light.
3. Something in the pots other than my plants was eating (processing?) nutes and is not now - perhaps good microbes killed by the H2O2?
And - should I do some sort of flush, perhaps RO water with just cal/mag? Water with that continuously until EC comes down a bunch?
Until I hit flowering. Why?
Now, despite adding longer watering times to get perhaps 40% runoff, my EC is 600 higher than input - hit 2000 for an input of 1450 last night.
I'm growing in coco/perlite, 5x daily watering. Plants just finished 4th week since 12/12 flip, and they generally look very healthy. When the EC started rising I noticed a small bit of tip burn.so I backed off on EC for a week, and the tip burn went almost all the way away, but not quite. That was an EC over 1200 or so. But after a bit of a drop EC still went up. When it hit 700 points higher than input I added more time to each watering, to get 40% (or more) runoff. EC dropped for a bit, but now is rising again. Last night I threw some RO water into the reservoir to dilute EC to 1200, and EC dropped 100 points today. This crop has done well on lower EC, so I think maybe I'll just keep it lower.
In the meantime, let's speculate, unless you know what's going on here.
I changed a couple of things when I flipped to flower. Around that time I started putting H2O2 into the reservoir. I also changed the nutrient ratio (per GH mid-level charts) and I started using Floralicious and Liquid Koolbloom. The LED power has been OK or a bit high throughout. I kept PAR above 700 through final veg and am up to 1000 or more now, because of plants crowding the light.
I'm wondering why the EC keeps building in two ways:
1. Something in the nutes is not being absorbed and is building up. (I'm wondering about Floralicious). Also note flushing out much.
2. My plants are simply not eating the nutes like they were before they lost 6 hours of light.
3. Something in the pots other than my plants was eating (processing?) nutes and is not now - perhaps good microbes killed by the H2O2?
And - should I do some sort of flush, perhaps RO water with just cal/mag? Water with that continuously until EC comes down a bunch?