C02 needed? Big Difference?

I've been reading a lot lately about people who are incorporating CO2. Are they just using it for the flowering stage?

How big of a difference is there? Noticable?

bigger nugs? weightier?

poeple say about 20% more if done right. The whole life cycle, 1500 ppm, only while light is shining

your buds will be denser!

I’ve been using Co2 for my first grow. I found it a real problem getting canister refills. The hydro stores round my way only do refills if you bought the systems at their shop. Found somewhere in the end, but it was hard work.

I hope the more experienced growers on RIU can confirm this, but I was told you only need to use Co2 in the veg stage? Once the plant goes into flower it’s doesn’t need high levels of Co2 so its just a waste of gas? My plants seemed to have grown big and strong in Veg using my Co2.