Too Late Start C02 Feeding While in Flowering?

Quick newb question: my grow is on day 26 in flowering and they are doing great. I want to start adding C02 to help with budding (weight and size) for a bigger yield. The 2 girls were grown from seed and are in 5 gal bubbleponics buckets. They are just starting to smell a lil bit. My hydro store reps told me that it is too late for the plants to benefit from adding C02 now this "late" into flowering and said that I should have added C02 during early vegg. As a first time grower of The Church and G-Bomb, I'm trying to pull at least an ounce from each plant.

The Church is 4.5 feet tall approximately and G-Bomb is about 3.5 ft tall. I was thinking those c02 pucks may work for now and maybe I can upgrade to a small tank for future grows. I will post pics of each of them later. See my photo album for a few pics taken a week or more ago. I would really appreciate your expertise here.

is your grow room tight like virgin pussy? are you remotely experienced with growing herb? is every other aspect of your grow perfect? if you didnt answer yes to all three of these questions then your simply not ready for CO2 and will waste your money.

if your room leaks you will waste CO2. if your nute regimen isnt perfect you will waste CO2. if your ventilation isnt properly synced to your gassing regimen you will waste CO2.


CO2 is for the big boys who know what theyre doing.



and please tell me your not discussing marijuana growing with your hydro store guy.