well I just flush my plants they're actually at 3300ppms I'm get it down to 900ppms but ph still at 5.00. I'm try to get the ph back to 6.5 or close enough 6.7. I don't got par meter at the moment. It's on wish list with bluelab soil pens and bluelab pulse multimedia ec/mc meter.
Using fox farm happy frog potting soil, was try to keep ph at 6.3 or 6.6. Also climate in tent around 20 celsius with light on and 40 to 50 humidity at night 16 to 18 Celsius and humidity the same. Food fox farm trio nutrient and bit of calmag. My light led PanthrX II from Crecer Lighting.
I was thinking it could of been nutrient burn or light burns. I wasn't using nutrient for like 2months and was trying to flush out nutrients while keep my led light panthrx2 on the lowest dim.