Hi,
iv noticed quiet alot of mushroom bags in rooms which leads me to question 1 should I be doing the same?
2.can I make this bag myself with mushroom?
Next question is should I add Co2 into the tent via a tank???
I dont think co2 is worth the cost and headache unless you're running a large scale grow op with 100% sealed and controlled environment. It's like icing on the cake after you have everything perfect. You can grow fat delicious buds without it
Unless you are growing in a closed/sealed system, co2 is largely a waste as your fans will remove nearly all of it before the plants can make any use out of it.
Save your money and concentrate on your care routine instead.