potassium deficiency or magnesium? or both? need some help!

[mintberrycrunch]

My babies seems to have some deficiencies and at first i was thinking this was magnesium related but the more its goes i feel like it might be a mix? I had this same issue on my last grow that was also my first and decided to add 1tablespoon of epsom salt to my veg soil mix but it doesn't seem to help much.

Base mix:
50% promix hp
25% perlite
25% worm casting

Admendments: (Per Gallon)
1 ts all purpose (4-4-4)
2 ts alfalfa meal (3-0-3)
2 ts kelp meal (1-0-2)
1 ts dolomite lime
1 ts epsom salt
1 ts gaia green rock dust blend

I am watering every 2 days with 6.3-6.5ph water and i started also adding soluble seaweed after the issue started to see if it would help. I will also check the runoff ph tonight or tomorrow and update the thread after that. My tap water seems to be super hard and alkaline, could this be related to my issue?

Currently i have the following flowering mix cooking and thinking of transplanting into 5gal pot using the new mix but might wondering if it might be too hot seeing how dark they are already.

Using the same base mix as the veg mix for each gallon:
1/4 cup of high N guano
1/2 cup of high P guano
1/4 cup of kelp meal
2tbsp epsom salt
2tbsp dolomite lime

Can anyone help me with what my next move should be to stabilize the situation and maybe also how to avoid this in the future?
Should i jsut transplant them now and hope it fixes the issue? is the new mix too hot and should be mixed with base soil? or just keep watering with soluble seaweed and/or epsom salt and wait before transplant?

 

[Creeperpark]

Too Hot. When you water you release a lot of nutrients with every watering. The plants above are suffering from too much nutrient exposure. Only use water for the next few waterings until the EC drops.

If you test your run-off at the very beginning and test regularly throughout the grow you can watch the EC drop or rise and catch it before it gets off too much. When you test the EC it's a good time to test the pH too.

I wouldn't up-pot into a 5-gallon pot until I fixed the hot soil with water only first.

 

[mintberrycrunch]

Too Hot. When you water you release a lot of nutrients with every watering. The plants above are suffering from too much nutrient exposure. Only use water for the next few waterings until the EC drops.

If you test your run-off at the very beginning and test regularly throughout the grow you can watch the EC drop or rise and catch it before it gets off too much. When you test the EC it's a good time to test the pH too.

I wouldn't up-pot into a 5-gallon pot until I fixed the hot soil with water only first.

Thanks for the reply! I was thinking i could avoid playing with runoff ph/ec but it seems to come back way too often to ignore it anymore so i just got myself a bluelab combo meter. Im hydrating the probe as we speak and will calibrate it tonight!

 

[mintberrycrunch]

I came back to update after playing with the new bluelab meter i am pretty sure i figured out the problem! The root farm ph indicator drops i was using to measure ph before were wayy off! I was probably watering at about 7.3 or more since forever!

So i am pretty sure this was interveinal chlorosis due to the ph being too high. I have included a pic to show what i mean where the water actually have a ph of 6.2 but it looks like 5.0-5.3 using the root farm drops.