Coco Coir yellow leaves

[Roz]

I think I see your tap report has around 72ppm of Calcium and Mag of 28ppm.

Are you in soil?

In Coco Coir

 

[myke]

A lot of the seasoned grows just use epsom for Mg ,so much cheaper then Calmag and you dont overfeed Ca then.

 

[Roz]

Same strain... same nutes..... the issue is that it ISNT THE SAME....

I bet you $100 your ph meter has drifted.... you need to calibrate your shit every fortnight bro!

I do calibrate my meter every few weeks. I will do it more often.

 

[Roz]

Without Calimagic?

With Cali-magic

 

[myke]

Rapid growth,shits garbage. Did you stop using it?

 

[TintEastwood]

With Cali-magic

With your tap (72ppm) probably too much total Ca.

 

[Roz]

Rapid growth,shits garbage. Did you stop using it?

Yes I stopped using.

 

[Billy Madison]

Pretty high PPM for that size. I bet you're pushing around 1400 PPM when you feed. Try to feed 1/4 to 1/2 strength and get a good amount of runoff and measure it. I feel like at that size you shouldn't be feeding more then 1.2 EC (600 ppm). I've never used that hard of water before but you shouldn't need cal mag with all the cal mag in your hard water + Micro/bloom nutes. Definitely looks like over feeding to me, if it was me I would stop using the cal mag and if you feel like you're getting a mag deficiency then use some epsom salt. Maybe like 1/4 teaspoon to a gallon.

 

[Roz]

Pretty high PPM for that size. I bet you're pushing around 1400 PPM when you feed. Try to feed 1/4 to 1/2 strength and get a good amount of runoff and measure it. I feel like at that size you shouldn't be feeding more then 1.2 EC (600 ppm). I've never used that hard of water before but you shouldn't need cal mag with all the cal mag in your hard water + Micro/bloom nutes. Definitely looks like over feeding to me, if it was me I would stop using the cal mag and if you feel like you're getting a mag deficiency then use some epsom salt. Maybe like 1/4 teaspoon to a gallon.

Thank you I will give that a try. I will throw away a few plants and start some new seeds this weekend. I was just thinking going to R/O water and if so should I add calmag to about 150 PPM and add my nutes

 

[Roz]

With your tap (72ppm) probably too much total Ca.

Do you have a link to that chart you sent me? Be cool for me to plug in my nuts schedule

 

[TintEastwood]

Do you have a link to that chart you sent me? Be cool for me to plug in my nuts schedule

Better yet.. Download the @Renfro spreadsheet. It has many products. Easy to what if.

Understanding and Calculating Nutrient PPM

Understanding and Calculating Nutrient PPM PPM (Parts Per Million) can seem like a mystery but it’s actually very simple. Basically the idea is to quantify how much “stuff” is in your water. PPM is commonly measured by a grower using an electronic pen which measures the electrical conductivity...

www.rollitup.org

Latest version deeper in thread.

 

[Billy Madison]

Thank you I will give that a try. I will throw away a few plants and start some new seeds this weekend. I was just thinking going to R/O water and if so should I add calmag to about 150 PPM and add my nutes

It's been a while since I used coco but I would aim for 100PPM calimagic early veg and then 150PPM for late veg/flower. You would definitely do your plants a favor by using RO water. Try not to feed more then 600PPM or 1.2 EC during veg and for flower you could bump it up to 750-850PPM 1.5-1.7 EC but be careful. If you see the tips of the leaf turning yellow maybe back off 50-100 PPM. You can always water down your feeding solution to lower the PPM instead of burning the plants. It's also advisable to always get around 10% runoff when watering to avoid salt buildup.