You need HPS to go with that. Room temps can be run higher. Normal fresh air is about 300 PPM. That's why we vent in fresh and out hot, yes. You will need to pump that up to 1500 ppm's for 4 to 6 hours flush with fresh air and do it again. Sealed room is a must. It will get slightly better yield and take a week or so off flower time. does it sound worth the work. Only if I were a big time grower.

Now the important part. I try not to be preachy but I am. Friends almost died. I just barely saved them.

NO CO2 IN OR NEAR LIVING SPACE. That's any animals peeps or pets. That's the commandment on CO2.

CO2 is heavier than O2 and can flood a room and suffacate you. It's a painless death but death it is.

Your can may not be big enough for your room anyway. You already know how to grow and the importance of venting fresh air. If your getting good fresh air don't bother. If not , each day just release alittle over the tops when you check them. It won't hurt if it's free but it won't make but a very small difference.
LOC NAR on probation Reviewed by LOC NAR on probation on . Co2 question I am starting my third grow Bubblicious and Aurora Indica both from Nirvana. I have heard people talk about using Co2 on their plants using tubing and valves to release it. I know Co2 is great for plants in general, but what does it really do to them? I have two Co2 tanks at my house not huge just 2 26oz tanks they were used for a paintball gun. I have no problem refilling there is a place that does it up the st. from me and for free:thumbsup:. So here are my main questions Is it worth Rating: 5