A box with a light inside it like a lamp etc....then cover it with something and put your dome on that. Never tried this method cause heating pads are real cheap. But it does mention this method in the Marijuana Hurticulture medical Bible.
Cpt. Zissou Reviewed by Cpt. Zissou on . Black leaves on clones The yellowing is not what bothers me, the blackening leaves are. Day 6 from clip. Rockwool was soaked for 24hrs. Domes have been on and vented every 12hrs. Temps are low at 61-72F. Humididty seems to be high as there is always moisture on the domes. They were just misted with an insecticide with pyrethrin and neem oil 5 days ago. Any ideas as what the problem is? Rating: 5