I just checked my EC across all 12 pots and it was either 3.4 or 4.1 with a PH (coco coir + perlite 60/40 that sits in a reservoir (basically a SIP), its called an Octopot) of 5.9 to 6.0 (Hydroponics).Low K is going to affect the older fan leaves first. This is toxic salts buildup frying the leaves. An EC of 3.3 is 3650ppm which is really high in my books and even 2.6 is way up there compared to what I ever use. Those extra nutes have built up in the leaves until the salt levels get so high that the leaves just burn up from the inside out. Not fixable but lowering your EC drastically will slow it's progress.
If using the 500 ppm convention, 1650 ppmLow K is going to affect the older fan leaves first. This is toxic salts buildup frying the leaves. An EC of 3.3 is 3650ppm which is really high in my books and even 2.6 is way up there compared to what I ever use. Those extra nutes have built up in the leaves until the salt levels get so high that the leaves just burn up from the inside out. Not fixable but lowering your EC drastically will slow it's progress.
I took a above ground barn project on this last summer. Was pleased to learn we needed no ac! And ran perfect temps through July snd august. How? Lights come on at 10pm- 10am. Large fans to pull in outside air which is closer to 65-75 overnight. Passive intake, thermostats set ez pz. And now that’s it’s cold we sealed the room snd supppiment co2 and push hot air from veg(24h light) into flower if it drops below 75… pretty freaking happy that it worked out.
Did all y’all have a plan B for a hot night?
You are correct. My printed page of conversions got all wet some time ago and I mis-read the bottom numbers. Still too high.
Lol big fans. I had 12 inch inline pulling air laterally. And a second 12 inch mounted in the ceiling(20ft) set a few degrees higher. When it got 85f plus both fans kick on and the passive intake is like a hurricane coming through. Even on the 80 degree nights it kept up.
Oh my word, I would love to hear that sound. HVAC systems are freakn musical.
Toxic salts buildup is basically slo-mo nute burn that happens slowly over time when the EC is too high for a prolonged period. Regular nute burn is easily fixable but once it's built up in the plant tissues it's there for good. It has happened to me for a long time before I clued into it. Chronically low RH here makes it happen a lot easier.
Sometimes I think it’s gunna pull the walls off and implode the whole ducking room lol!! Magical
What is the difference between the ppm columns?You are correct. My printed page of conversions got all wet some time ago and I mis-read the bottom numbers. Still too high.
I need to print out a new one like this.
View attachment 5045352
They're all just different EC conversions
This is FAR more relevant here than pH I'll guarandamntee.
That's way high even for experienced in hydro. Consider lockout.Low K is going to affect the older fan leaves first. This is toxic salts buildup frying the leaves. An EC of 3.3 is 1650ppm which is really high in my books and even 2.6 is way up there compared to what I ever use. Those extra nutes have built up in the leaves until the salt levels get so high that the leaves just burn up from the inside out. Not fixable but lowering your EC drastically will slow it's progress.
Oh yes but i figure id still post the charts for info purposes.
I used to DWC Afghani Kush a lot and it could handle up to 1500ppm during the stretch and grew huge colas but the buzz didn't rock my world so I gave that one up. With later plants and the low RH I would often be running at 600ppm the whole time.
