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Ph too high or low?

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Ph too high or low?

Rama777 11 Replies 1,403 Views
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Rama777

Rama777

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#1
Is it possible to determine which direction I’m off from these symptoms?
Oh too high or low
 
#3
Need more data.
What are you growing in?
What stage of life is the plant?
Lights, distance away from canopy?
Type of light?
whats the ph you are adjusting to now?
Auto or photo period plant?
What media are you growing in?

Looks like cal/mag deficiency but has the striations of light burn as well.
 
#5
OldOneEye said:
Need more data.
What are you growing in?
What stage of life is the plant?
Lights, distance away from canopy?
Type of light?
whats the ph you are adjusting to now?
Auto or photo period plant?
What media are you growing in?

Looks like cal/mag deficiency but has the striations of light burn as well.
Click to expand...

Pro-mix, feeding with megacrop. Every watering at around 400-500ppm. Always a full dryback. I have not ever watered to runoff. 200 watts of light at 24” (low ppfd..).

I ph the water to 6.0-6.3

I was using RO water with enough of my well water to bring the ppm up to 50 bit after one of the plants got manganese locked out, I dropped the well water addition and went with straight RO, no calmag.
 
#6
Manganese lockout on the plant in the front middle. The photo I put in the original post is from the plant on the middle right. 9 plants total on day 38 of flower.
Temps are upper 60’s with lights off and 70-76 with lights on.
IMG 1425
 
#7
I don't have much experience with Promix but I believe I see a Calcium or Magnesium deficiency but I think it may also be in a hot spot. Not radiant heat but hot from the heat of the light. Which i would expect to see in the center of the light rather than the edges. Note that if it is older damage it will not heal, so don't look for the damaged leaves to recover.
 
#9
Week4Bytch said:
No. You'd have to measure pH someways to know for sure. Helps determine if your over/underfed or just a lockout. And if your bottle feeding and watering with no runoff, not good.
Click to expand...

So I just watered to runoff for the first time and my input is usually around 500ppm. My runoff was 1,000 so I’m assuming that means nutrient buildup. I’m thinking I should do a couple water only(s) and then after that reduce my feed ppm to 400 down from my regular 500. Solid plan?

My runoff ph was good so I’m thinking all my symptoms are from excess nutrients. Sound logic?
 
#10
Rama777 said:
So I just watered to runoff for the first time and my input is usually around 500ppm. My runoff was 1,000 so I’m assuming that means nutrient buildup. I’m thinking I should do a couple water only(s) and then after that reduce my feed ppm to 400 down from my regular 500. Solid plan?

My runoff ph was good so I’m thinking all my symptoms are from excess nutrients. Sound logic?
Click to expand...
Yup... Your on the right track
 
#11
@Week4Bytch - If I’m going down to 400ppm from 500, what do you suppose my runoff ppm should be with water only before I decide to start feeding again? Like when my runoff goes down to 4-500ppm, does that tell me that it will be ready for nutes next time or do I want to see even lower than 4-500ppm before I start feeding again?

I’ve read that runoff should be ideally within 100+ of the input, but I’m not sure how that relates to water only versus with checking ppm runoff with nutrients added.
 
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#12
Rama777 said:
@Week4Bytch - If I’m going down to 400ppm from 500, what do you suppose my runoff ppm should be with water only before I decide to start feeding again? Like when my runoff goes down to 4-500ppm, does that tell me that it will be ready for nutes next time or do I want to see even lower than 4-500ppm before I start feeding again?

I’ve read that runoff should be ideally within 100+ of the input, but I’m not sure how that relates to water only versus with checking ppm runoff with nutrients added.
Click to expand...
Me neither, just read the plants. The main focus should be the runoffs, you don't want the salt to build up in the soil. The runoffs prevent that from happening. It's one of the main reasons you don't want to drink water from the ocean, it will fuck you up. Don't feed your plants ocean water. Runoff or drown in salt, your call.
 
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