Had some ups and downs and am wondering if I got overzealous with feeding. Is this nutrient burn? Should I flush?
I topped about 4 days ago.
I initially thought this was a mag deficiency, which it probably was based on me underfeeding with cal mag (about 1/4 of recommended dosage spread over multiple waterings, so really very little). I have since addressed the mag issue/am addressing.
Updated photo. Foliar fed cal/mag about a week ago. Not sure if what remained was resolved. Not sure if it’s not nute burn. Expertise needed – too stupid to solve by myself.
Yes, no need to spend a ton of money on a TDS meter. Just make sure you get one that reads in the 500 scale (NACL) as that is pretty much the standard here in the 'States.
Spend your money on a decent PH meter. This one is pretty good: