Why is this yellowing? Autopots system running. Temp and humidity on point 75°-80° and 50-55 RH, HLG 600r lights. PH 6.0-6.3
- Thread starter Lstangel64
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Lstangel64
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.Coco perlite 70/30. It's nutrients are in the water. It automatically fills when empty.
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What ratio are you using? You should be using a 2:3:1 ratio of micro, gro, bloom.
What is the current EC and pH of the reservoir?
Lstangel64
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Lstangel64
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I was told to use 15ml of each per 5 gallons
Lstangel64
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You said 2:3:1, what would that measurement be per 5 gallon ?
Lstangel64
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Should i go to these charts ? At this point I'll try anything to save them.
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HydroKid239
Well-Known Member
Try bringing your ph down to 5.8
It’s showing quite a few issues. It’s there (the food) because you’re feeding it. The problem seems like the plant isn’t eating.
It’s showing quite a few issues. It’s there (the food) because you’re feeding it. The problem seems like the plant isn’t eating.
calvin.m16
Well-Known Member
I hated autopots too finicky. Octopots for the win.
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twentyeight.threefive
Well-Known Member
No, that's 2 parts micro to 3 parts gro to 1 part bloom. A part can be anything. A teaspoon, a milliliter, an oz.
If you look at the charts you posted, it calls for 10ml micro, 15ml gro, 5ml bloom for aggressive growth. That would be a ratio of 2:3:1. In other words, whatever amount your bloom part is, you want 2x that amount for the micro, and 3x that amount for your gro part.
Since you're using 15ml per 5 gallon of each micro, gro, bloom, you are using a 1:1:1 ratio (15:15:15), which is for mild veg growth.
They are calling for 10:15:5 per gallon, so that would be a 2:3:1 ratio with 1 part being 5ml (the bloom part). That is too high of an EC, but you want to use that ratio (2:3:1) in order to have the NER (nutrient element ratio) be balanced and then dilute the mix so the EC is appropriate for the crop you're growing since these nutrient EC's are not specific to cannabis.
You want to use that NER (2:3:1 micro, gro, bloom) and dilute it down to the EC around 1.2-1.6. You also want 4-5ml per gallon of the calmag if you're using RO water.
The ideal pH for coco is 5.8. Your pH is a bit high but 6.1 wouldn't cause an issue like this unless that 6.1 isn't really 6.1.
When was the last time you calibrated your pH pen? It should be calibrated once a week, no matter how expensive the pH pen is.
Autopots aren't the best for coco because coco wants to stay moist at all times and when you wick from the bottom up, you are not getting runoff which helps push the salts out of the medium, so you may need to top feed by hand to push the salts out.
You should flush by hand with an EC of about 1.2 of a ratio of 2:3:1 micro, gro, bloom top fed until what comes out of the bottom of the pot is 1.2 and then put it back in the Autopot system and resume because I think you have a lockout or your pH pen is way out of calibration. Dip it in some 7.0 reference solution and see what it reads.
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Lstangel64
New Member
Awesome. Gonna work on that today.... much appreciated.....
Star Dog
Well-Known Member
I used autopots for a number of years I liked them and I'll eventually go back to them for the simplicity.
I still use a saucer and a have a inch of perlite in the pot with some plants.
The bigger ones haven't been top fed since February I give them 0.8ec and get no problems.
I still use a saucer and a have a inch of perlite in the pot with some plants.
The bigger ones haven't been top fed since February I give them 0.8ec and get no problems.
Lstangel64
New Member
Prepared everything today, my tank ph is sitting at 5.8. Ec on point. I even calibrated everything again. I am now at 2:3:1. Let's see what happens. I'm at the point now were throwing these bitches out is an option.
Did you remove the plants from the Autopot setup and hand flush the plants from the top with your EC feed?
You should calibrate your pH pen once a week. Chemistry labs calibrate pH pens every single time before use because they need to the hundredth accuracy. To the tenth is fine for our purposes, so once a week.
My step-by-step would have been:
1) Dip the pH pen into 7.0 calibration/reference solution - if it reads anything close to 7.0, then pH wasn't the problem; if it reads something like 7.5 or higher (or 6.0 or lower), then you had a lockout due to pH being off.
In that case:
- Calibrate the pen and take an EC reading of the res
- Fix res pH and flush the plant with EC feed until what comes out the bottom in runoff EC is the same as the EC you are flushing through from the top (usually 3x the volume of the pot)
2) If the pen was fine, then I would have taken EC feed and flushed the plant from the top and caught the first 8oz or so of runoff into a clean container and measured the EC. If the EC was far higher than what the EC of the res, then you had a lockout due to salt build up.
In that case:
- Flush the plant with EC feed until what comes out the bottom in runoff EC is the same as the EC you are flushing through from the top
3) If the runoff EC of the flush was within reason compared to the EC of the res (within 0.4 EC), then the plant is a heavy feeder and needs more food. Being that you have several deficiencies that appeared at once, it's most likely due to a lockout and the plant can't access the food already available to it.
Coco/perlite with synthetic nutes is fairly straight-forward to figure out if you do a step-by-step process of elimination from easiest step on. It's usually the pH being off or a salt build up.
The nice thing is once it's fixed, you'll get immediate results due to the substrate basically being hydroponics. That said, those shitty looking leaves are always going to look shitty, so don't expect that to change - look at the new growth for health and then begin to remove those shitty leaves because bugs love sick plants and go for the sick leaves first.
GreezzyGuy
Active Member
looks like a text book molybdenum def. lower ph to 5.6 if it was nitrogen ,magnesium ,phosphorus,or potassium it would be more uniform
at 1.6 ec its not a toxicity,bring the feed up to 2.2 ec with 5.6 let it drift to 6.1 the back down.
Micro ,gro and ,bloom 2.2 ec for 600w and 1kw for 400w ,250w 1.6 to 1.8 ec if you run co2 hammer them.
at 1.6 ec its not a toxicity,bring the feed up to 2.2 ec with 5.6 let it drift to 6.1 the back down.
Micro ,gro and ,bloom 2.2 ec for 600w and 1kw for 400w ,250w 1.6 to 1.8 ec if you run co2 hammer them.