Dears, please tell if there is any value of using ...

Hello ! So as your soil is a pre-fertilized soil you will not have to use nutrients until the end of week 3 , however you can start using nutrients for roots such as rhizotonic or enzymes right now on the 1st week to settle some benefical bacteria in your soil . Then you will probably need to use a Grow/veg nutrient ( a couple time ) to help her during the late veg and the 2 first week of flowering then you need to switch to a bloom/flowering nutrient and maybe some Pk booster and taste enhancer if you think it is necessary. Now concerning your Co2 generator I think you can use it cauz Co2 will remain the same molecule but the Co2 need to be controle so check it and make a little math to know if the generator can be set up to automatically power on or off when CO2 levels reach a specific ppm (higher than 2000ppm will kill your plant) , and you have to know that Co2 is more efficient with high temps like 30/32 °C. I hope it will help you 😁👍