How long do they usually last for? My room is 4Lx4Wx7H should i put more than one in my grow box. I have a 6in inline w/carbon filter with a 10x10 vent for intake if this helps answer my ?s. Thx Keep smokin
Well, the thing is, they really don't work in the first place. I mean sure, they bubble, and some co2 comes out. But for you to see any actual improvement in your plants, you need to get the co2 levels in your box up to a certain level, and none of the diy setups I have seen have even come close to doing this.