bright yellow spots

[headshake]

it looks like you got some water or nutes on there and the lights burned them.

your temps are getting pretty high. are they in a box or tent and if so what size? are your intake and exhaust fan the same CFM?

and your res temp seems to be getting a little high. i'm not a 'dro guy though, so don't listen to me there. i'm sure one wil chime in.

did you soak your rockwool in pH'd water?


-shake

[jashbery]

Thanks headshake. i hope it's just water spots, as it's possible i dripped a bit from my fingers after they were in the res tank...and yes, the rockwool was soaked in ph'd water...i know what you mean about the temps, but sadly there's not much i can do about it other than spend money i don't have on an air conditioner which will further increase my carbon footprint! will maybe just do grows in cooler weather next time...
thanks again for your thoughts,
best
jash

[LOC NAR on probation]

Do you not see this problem in cooler wheather ?
If not it's heat. Your nutes EC kind of high. Even the good leaf looks a little crispy on the edges. I sprayed a foliar feed on some and that's kind of what it looked like plus the water burned yellow spots.