Yellowing Lower leaves and brown spots

[Moonbeam]

Have a few seedlings whose leaves are starting to yellow/develop brown spots. I'm pretty sure its a pH problem(just got a meter and had been watering with 7.5 ph water). Did a runoff test and the pH was around 7.4. Runoff water was a yellowish color. Flushed with 5 times their volume in water and could only get it down to 6.8. Anything else I can/should do? Thanks for the help :thumbsup:

I have the same problem& could use some help. After checking for overfertilyzing -burn- I checked for deficiancy. I think it might be Magnesium or Boron. I plan to get some epson salt & see how that helps. Let me know if you have success & I will do likewise.


Moonbeam