since co2 is heavier than air, you don't want to spray it on the plants. release it above the plants, and it will slowly come down onto them.

Co2 is used only during the lights on period. Thats it.You may want to get a hose, and run it just above your plants, with holes drilled in it, pointing at your ladies, this makes a nice delivery system.

I never heard an echo so loud!

k looked at them tonight and they seemd of pearked up and looking much better than yesterday. how frequent can i use the c02 on her? dayly or like every other day? im hearing two different storys on when to use c02, lights on or lights off? thanks guys.

on only. lights off is a waste. also, unless your temps. are mid to upper 80's it's also a waste.

temps are sadly at 88 - 90 deg and im going to get a portable air condition machene from the pawn shop and put in here to cool it down cuz its just too dam hot. ill give it a try when lights turn on. what exactlly does it do to the plant, heard it makes it grow faster or something. my friend told me to get c02 in there.

those temps. aren't too bad. the higher temps. are necessary because w/o them, the stomata won't open as wide. yes sir, it is great for growth.

sweet sweet.

Good job with the co2. Like an ass, I left the valve opened on my
tank lastnight to wake up this morning to an empty tank. Stoner move I guess. Anyways check out this link to calculate the amount of co2 you need for your space. You might be over doing it a bit.
Good Luck

CO2 Calculator - Greentrees Hydroponics

Has anyone used 'dry ice' for a CO2 source? Seems like it would be a easy subsitute for tanks.