I get it on all my grows and I am almost 100% sure its a cal-mag thing... they get crispy and brown. calcium leaves the brown crispy leaves and mag. will yellow them out leaving the veins of the leaves green
I adjust my ph if needed and give them lots of Botanicare cal-mag+ and it stops. it wont repair whats gone but will stop it from progressing any further. also sometimes I use epsoms alone or on top of cal-mag+.... My Think Different were very hungry for cal-mag for about the last 4 weeks I had to double up on the dose to 2 tsp/gallon instead of 1
I was running low 6.1ish for a while because I was told with sunshine and promix soiless mixes it should be like hydro but imo that's bullshit. Sense I started hitting 6.5 and staying there the cal-mag def. has stopped
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