-- we need dosage amounts and frequency for your nutes,... I use MC myself-
... what brand soil?
... your tap water, any idea how hard it is?
..symptoms looked mixed, muddied,... BTW don't remove the bad looking leaves, it hurts, not helps,... they serve as reserves for some mobile nutes, and where on the plant they were offers clues as well... That said, I think you have a lockout issue either from off pH, or really hard water cumulative build-up of minerals... potentially both! That other info is needed first though,...
If you like growing in soil, you'll need a few things to help you avoid problems like this: pH meter (for liquids only), pH probe (in-pot testing, best by far), and TDS/EC meter to get you such info when it really matters! The Accurate 8 soil pH probe is a good unit for the $; contrary to what you've been told, pH meters are not short lived unless you fail to take proper care of it...( those cheap ones are what's not reliable for long)... I have an inexpensive HM-80 (lots of choices out there, shop around) that's 4+ years old; as long as any unit is stored in the right solution, and calibrated with 7.0 and 4.0 solutions, never let dried out, and rinsed clean between each use with clean low ppm water, they can last for years,... spend a little more for a unit with replaceable electrodes and you're really set for the long term! I will, when this one finally stops working right....
....All such meters are fairly delicate instruments, you have to put in the time to maintain them....
All this is about knowing what your water is like, how strong the nute solutions is (TDS), and making sure you adjust the solution pH after everything is added in if needed (Ca-Mg first always), and monitoring what's happening in the pot... dialing in things before you water/feed goes a long way to keeping in-pot pH in range, and preventing nute burn, lockouts, underfeeding, etc.,...
