Co2 users help pls

Hi Folks!
I can see that this forum is better than any book out there, and I need some help working out co2 delivery.

I found a cool co2 delivery unit that uses totaly disposable co2 canisters, maybe not a biggy for people but co2 deliverd to your door is always good, and the price of the unit I can get for £100 in the UK with bottle.

http://www.jbl.de/factmanager/index.php?lang=en

Now this unit is meant for aquariums, but I am hoping it can be used in a grow room.

Grow room size = 1 meter width, 3 meter lengh and 2.5 meter height or there abouts. 30 plants.

Now the co2 unit says that it can release between 1 bar and 1.5 bar preasure, I have no idea what that means, or how you can transfer that into caculating how long the unit would need to be on for my size room to get to 1500 what ever it was, (co2 per unit figmajig) Or how to caculate how long that bottle would last if I have a totaly sealed room and say my lights where on 12/12 for arguments sake.

If any of you fellow tokers out there can find it in their heart to go on a skunk fulled mission with a caculator and pen and paper, then I pledge as a noob to the forum, to at least once a week try and answer someone else's question with the wisdoms I have found on this good site.

Many many thanks in advance!

Wiry

(stinkB Rulz):

I don't know how big your bottle is but for that size of room you need .04 cu/ft per hour to reach 1500 ppm

growyurown said:

I don't know how big your bottle is but for that size of room you need .04 cu/ft per hour to reach 1500 ppm

Click to expand...

Thank you so much, any ideas tho that the company mean when they have a release from 1 bar to 1.5 bar, can you look at the link please and maybe you could work out what they mean, its a 500Gram bottle, but I can buy more, just not sure if 1.5 bar will fill the room quick enough etc.

Thanks for your time!