Last Sunday I increased the nutes so that the ppm was on the higher level (600-625) as the feeding schedule showed. Dec 9th I started to see some lime green (video) leaves on new growth. The ppm would go up mostly & down slightly, but the lime green spread & eventually turned yellow (last pic from today). I did a water change the other day & lowered the ppm/nutes to around 575-580 range. I've been reading around that this might be a sulfur deficiency? Some suggested adding Cal-mag. Today I added 2 ml more of Cal-mag & snipped some of the darker fan leaves that had some damage. I ordered epsom salt, waiting for it to arrive (tomorrow). Any other suggestions/diagnoses are welcomed! 😊