Mag def?

[raggyb]

Is this mg deficiency? Plants in veg. First organic. Tap has Ca, left out to declor. Gypsum in soil. Watered epsom 1 week ago and calmag 2 days ago.
Ethiopian x Maui Waui and (Ethiopian x Candida) x NL. Ethiopian father is 100% sativa and incredibly light feeder.
Will these leaves get better if it's fixed? Thanks!
Ethiopian x Maui Waui (Ethiopian x Candida) x NL

 

[Bakersfield]

Is this mg deficiency? Plants in veg. First organic. Tap has Ca, left out to declor. Gypsum in soil. Watered epsom 1 week ago and calmag 2 days ago.
Ethiopian x Maui Waui and (Ethiopian x Candida) x NL. Ethiopian father is 100% sativa and incredibly light feeder.
Will these leaves get better if it's fixed? Thanks!
Ethiopian x Maui Waui View attachment 4299788(Ethiopian x Candida) x NL View attachment 4299789

It looks that way to me.
Any idea what your Ph is at?
Gypsum will raise calcium, but lower the Ph.
The Magnesium could be locked up.

 

[raggyb]

It looks that way to me.
Any idea what your Ph is at?
Gypsum will raise calcium, but lower the Ph.
The Magnesium could be locked up.

I've tried before to soak soil in water and take pH that way but I don't think I have the method down. I have litmus paper. Would like that to work. I'll give it a try again. Do you know how long I have to soak it and how much water to soil?

 

[Bakersfield]

I've tried before to soak soil in water and take pH that way but I don't think I have the method down. I have litmus paper. Would like that to work. I'll give it a try again. Do you know how long I have to soak it and how much water to soil?

I've used soil ph meters for soil testing and hydro ph pens for solution, but I've never used litmus paper.

 

[Blitz35]

Any idea on the ppm's of your tap? How much calcium does it contain? I wouldn't think you have a ph issue, especially if going organic. Gypsum does not affect soil ph, calcium sulfate is ph neutral, however, gypsum is a few hundred times more soluble than lime..so if you overwater, alot of that calcium will become available..add it to the calcium from your tap, and the calcium from cal-mag, and maybe it's too much calcium? Or maybe just not enough magnesium. Maybe try epsom salt rather than cal-mag and see if it helps?

 

[Bakersfield]

Any idea on the ppm's of your tap? How much calcium does it contain? I wouldn't think you have a ph issue, especially if going organic. Gypsum does not affect soil ph, calcium sulfate is ph neutral, however, gypsum is a few hundred times more soluble than lime..so if you overwater, alot of that calcium will become available..add it to the calcium from your tap, and the calcium from cal-mag, and maybe it's too much calcium? Or maybe just not enough magnesium. Maybe try epsom salt rather than cal-mag and see if it helps?

Sorry, Gypsum will lower Ph.

 

[Blitz35]

Sorry, Gypsum will lower Ph.

You need to do more research before passing around false info! Gypsum is ph neutral! It will not lower ph at all, and it will not raise/buffer ph as it does not contain a carbonate ion.

 

[raggyb]

Any idea on the ppm's of your tap? How much calcium does it contain? I wouldn't think you have a ph issue, especially if going organic. Gypsum does not affect soil ph, calcium sulfate is ph neutral, however, gypsum is a few hundred times more soluble than lime..so if you overwater, alot of that calcium will become available..add it to the calcium from your tap, and the calcium from cal-mag, and maybe it's too much calcium? Or maybe just not enough magnesium. Maybe try epsom salt rather than cal-mag and see if it helps?

Water ppm is 120 - 130?. I'm going to try soaking a small sample overnight in degassed tap, filter it and take pH. I'm happy with litmus, it gets you within .5 on the pH scale. I'll see any egregious pH problem. But the tap is 7. Lemme see, I thought it's a good point mg may be locked out due to some over nute. Because of the Ethiopian heritage it could be these are ultra finnicky too. My soil shouldn't be very hot but even so the ethiopian had some problems with that same ppm of last go though slightly different ingredients. Runoff when I first mixed this batch was about 700 ppm with 120 in.

 

[Blitz35]

Water ppm is 120 - 130?. I'm going to try soaking a small sample overnight in degassed tap, filter it and take pH. I'm happy with litmus, it gets you within .5 on the pH scale. I'll see any egregious pH problem. But the tap is 7. Lemme see, I thought it's a good point mg may be locked out due to some over nute. Because of the Ethiopian heritage it could be these are ultra finnicky too. My soil shouldn't be very hot but even so the ethiopian had some problems with that same ppm of last go though slightly different ingredients. Runoff when I first mixed this batch was about 700 ppm with 120 in.

Some strains can be really finicky..i had a pineapple chunk once that wow, just did not want nitrogen at all, i couldn't even give it half a teaspoon of a 5-0-1 in a gallon of water, or it instantly clawed and slowed growth! Flowering was hurt as well as i couldn't adjust in time to her sensitivity! The one next to her, a different strain, was good with 1.5 teaspoons of the same nute, in the same exact grow medium under the same light, so who knows..some ladies are really picky! As for the 0.5 ph being off with your test, that's quite a difference! If the results come back that your ph is say 6.8...with a 0.5 point error possibility..that means it can be either 6.3 or 7.3..it makes a big difference!

 

[raggyb]

Some strains can be really finicky..i had a pineapple chunk once that wow, just did not want nitrogen at all, i couldn't even give it half a teaspoon of a 5-0-1 in a gallon of water, or it instantly clawed and slowed growth! Flowering was hurt as well as i couldn't adjust in time to her sensitivity! The one next to her, a different strain, was good with 1.5 teaspoons of the same nute, in the same exact grow medium under the same light, so who knows..some ladies are really picky! As for the 0.5 ph being off with your test, that's quite a difference! If the results come back that your ph is say 6.8...with a 0.5 point error possibility..that means it can be either 6.3 or 7.3..it makes a big difference!

I measured my sample and it's between 6.5-7. For me litmus tends not to error above or below the correct reading. I think the error is more like +-0.25. I try to decide if it's 6.5 or 7 but think it's definitely between the two. I have almost stopped caring about pH. I was pH downing to 6 and then I watered to runoff and measured and the pH was back up to 7. Felt like I was wasting my time so I stopped pH downing. But once in a while I want to check in case something's way out of wack.
Not much change. I'm going to try some epsom again.