About CO2 supplementation

Okay, I've studied the CO2 methods, and I know that the yeast method is not really favorable. I've gone ahead and mixed a couple bottles anyway, and they are currently supplementing my plants. Because of my job, I happen to have a ppm reader, and the CO2 level is around 1200 right now. My question is: How long does the recipe last?

I'm using, 1.5 cups of sugar, 1 packet of dry active yeast, and about a litre of water.

Anyone have any ideas? Pics coming soon!

You have a CO2 monitor? The cheapest one I've seen was 1000 bucks, but they are great to have!
I don't know how long your goop will last. You should have the output going through a tube to the ceiling over the plants. The high end of the tube can go down into a glass of water, so it will bubble and you'll know what is being released.

Once you get a real CO2 setup, you can hook up your monitor to a switch that will control the release to keep it at 1500ppm. That is the hot setup.

HTH

i use this method and my bottles last about 3 days.
A couple times a day I shake up the bottle with my finger covering the hole then slowly release the hole under the plants then squeeze it around under the plants. CO2 rises. Do this till no more pressure really builds up when you shake them, then you know its done.

-Tek

co2 is heavier than air so it sinks

i will post pic of my co2 setup as soon as I find my camera so you can see what a real one looks like

thanks for the help fellas.