AS WITH ANY CO2 ENRICHMENT,, USE IT DURING LIGHTS ON, NOT DARK PERIOD.

I NOTICE BIG DIFFERENCES WHEN I USE CO2 GAS. I CAN TELL WHEN MY TANK RUNS OUT. THEM GIRLS LOVE THE GAS!!!

GOOD LUCK
BOYZNUS Reviewed by BOYZNUS on . using dry ice 4 co2 ive got 2 shop lights with 2 builbs in each light, 60 watts each builb, and 4 plants inthe center of the lights. i keep the lights about 2 inches from the top of the plant. the lights are hanging from the clothes rack in my closet. i bought a little fan and some plastic drop clothes (the ones for panting). covered the whole thing with the drop clothes so its hanging from the clothes rack to the floor, got 3 pounds of dry ice put it in a tub with warm water and stuck it in the enclosed area on Rating: 5