I think you've missed a couple KEY elements to CO2 enrichment. I assume you are using a fermentation approach to CO2 manufacturing. Don't spray anything anywhere. Fermentation should be done inside a jug in the grow room. A fan should be placed to disperse the co2 from the top of the jug,bottle,etc.

CO2 is a gas (unless very very cold). There is no way to spray co2 onto plants. Plants breathe CO2 and release oxygen. I use CO2 in a tank and it is spread over the plants with an oscillating fan.

If you're not using an HID dont bother with CO2. Your plants are not getting enough light to utilize CO2 enrichment.

Be prepared to excellerate your growing schedule when using it. They use everything faster.

I dont understand why you would spray "water" (a liquid) after putting "CO2" (a gas) onto the plants. If you're talking about spraying whatever "mash" you've concocted directly onto the plants then you shouldn't do it.

Laterz