Help me with a CO2 Question

[truthseeker]

it's not the cheapest way but it works great me and my buddy buy a brick of dryice and split it and put it in hot water.the dry ice is solid co2 when put in hot water it turns to gas and fogs your room out with co2 its like 80 cents a pound and 2 or 3 lbs is great for 3 or four plants. when you do it turn off your fans and place the water and dryice above the plants if you can the smoke tends to fall down i love this method

[ledgrower]

what you could do for a cheap co2 maker is get a colman stove the kind used for camping and either a small bottle or a big bottle of propane. and leave the burner on over nit... but have it the lowst setting..almost like the pilot light..this will make just the same as those big expensive ones..just becare u dont burn your room down:rasta:

[mistyganjatree]

the idea of creating co2 to aid in photosythasis during the night!!!!???? is somewhat confusing, the plant creates co2 when the light is off, it needs it during the light hours,, burning also causes carbon monoxcide! not a good effect, if not vented it can be deadly to humans and plants!

[faithlessxxx]

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Sugar + yeast + water in bottle==CO2.
Tommygirl, is that you???

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[risndeath]

Most simple is probably the Dry Ice Method, most money efficent is Baking Soda+Vinager, just shake it every now and then, add more Vinager once all the Baking Soda has absorbed all the vinager, and like other posters have previously posted, redo every 2 days or so.