i added an osmocote tablet to the sand, and i sometimes water with some Hoagland solution i got from a greenhouse at my school (that I am using for experiment purposes in school.)
But yeah i think i should replant it soon. what type of media mix? how much sand, how much perlite, how much peat, how much organic soil?
Thanks for the symptom ID. it makes sense because nights were getting cold in early fall and it may have frozen for a bit.