co2 experimentation

As you know, co2 can get expensive, and with the ambient temps rising as summer nears, it is going to cost even more.

I hate to sound cheap, but cost is always a factor in life.

Now I fully realize that plants can not utilize co2 during the lights out cycle.

I wanted to do some experimentation to see if I could maximize my investment in co2, here is what I have been doing, you can use it or not.

My lights turn off for the day at about 10pm, at about 6pm, I have been filling the room with co2, obviously with no exhaust fan blowing. Although, there is a small fan inside for circulation, and to keep the co2 off the floor.

At 10PM the lights go out, and I do not exhaust the room, I simply keep it sealed up til morning. When the lights come on, I stay away from the room for about 3-4 more hours, at which time, the temps have risen enough to warrant using the exhaust fan.

Doing it this way, I feel I am getting 3-4 more hours out of the co2 for free.
Peace

i think they utilize it for they need to breathe (with lights out). just not nearly as much as they would with the lights on. but either way i think that is as good of way as any to utilize your co2 more effeciently.

as soon as you stop introducing the gas the levels start dropping off.

A co2 meter is 400-700 usd but you will see a dramatic rise in o2 levels very rapidly. my 10x10x7 goes from 1660 15 minutes 730 then 30 minutes 410
at the start of the day before lights on i was 210 after the first 15 min gas 1140, after the second cycle 1690

the co2 levels will lower very rapidly i started putting plastic on the walls and floor to help keep the levels up longer.

when there is no light there is no need for the plant to use this gas

i will do the same test tonight to see if it disipates faster with lights on verses off