CO2 Bags Hydroponic Growing x 2

Been hanging for 4 days now - with holes in as instructed and 2 ml of water, using 2 of them I have a co2 sensor and neither have made one bit of co2

Easy to use , wouldn’t be without them they do work

Grate just what I needed

Well these where completely empty after just 4 weeks as in only plastic bag left so not sure if these are better than the fungus c02 bags

Its good. Thank you

Thanks a good product