need some advice

ok i have 3 plants growing right now but i'm having a few problems 2 of my plants have gray spots on their leaves
and i need to know what this means
i'm thankful 4 any help

Could be many things.. Check this thread out. Very informative.

https://www.rollitup.org/marijuana-plant-problems/157345-have-plant-problem-check-here.html

Check this site out as well. It may help you out: http://www.ganjaguerrilla.net/

thanks ill look at them now

I got one.....what temp is to hot when running co2???