how long will a full 10# co2 tank last?

I have a small area 4ftx4ftx6.5ft grow tent. Im running 8 plants in flowering how long will a 10lb co2 tank last? I was thinking about getting one since my grow is small.I will be using a titan regulator with it.

What kind of Co2 monitor will you be using. Because with out one there really is no point. IMO

I thought I only neede a regulator any suggestions for a monitor?

can anyone help me?

You don't need anything other then waht you have. My 20lber lasted 2 1/2 weeks set higher then my room required.
It could have lasted a month.

Your number is about 1.0 to 1.5 of flow so it should last you at least a couple of weeks.
And thats if you follow the noraml directions of 2 1/2 hours on when the light comes on and every other 15 after that untill an hour before your lights go off.

bud man jay said:

I thought I only neede a regulator any suggestions for a monitor?

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you can use a regulator with a timer, but without a monitor, your just guessing at it. I use a sentinel and it keeps my room at 1500 ppms constantly,when lights are on. If your going to try and control your enviroment, you can do it right or halfassed, the results will be the same.

ok cool so what does the monitor do and will the co2 be affective even though my fans are inside of my tent? I have two small circulaton fans and a 6" can fan cooling my light hooked to a carbon filter.

if your light fan is open to the inside of the tent then your just going to suck out the co2. On another note you really do need a controller with out one you have no ideal of what levels the co2 reaches and for what amount of time. You would be amazedhow fast it disapates in a closed environment. Like victory said a halfassed attempt will get you half ass results