It just worked when I tried it again.


I just ran one of my rooms 7 x7x7 it said

Grow room area: 343 cubic feet
Amount of CO2 required: 0.6174 cubic feet
On time: 9.26 minutes

At this flow rate:
If you are using a 20 pound CO2 bottle with a regulator, it will last 43.7 hours.
If you have a CO2 Generator a 5 gallon propane tank will last 135 hours

that is correct, 1800PPM at a rate of 4CFH for my tank CO²

Sorry if it did not work for you.