Co2 Enhancement is a luxury in hydro growing. It can make your garden explode with growth. Plants mostly utilize Co2 in the vegetative stage of growth and only during the hours when plants have light.

Discontinue Co2 after budding commenses or when flowers begin to appear. A make shift lever can be made from parts supplied from the Home Depot. Set ventilation timers off when using Co2.

WARNING avoid prolonged exposure. High levels can kill you. I highly recommend a regulator. This will help not to waste Co2. This is not the way to set this up I just hung it there to give an example. It is supposed to go right under the light. So the Co2 goes directly on to the top of the plants. Make sure it is not to close to shock the plants. Punch holes in tubing and brace with a wire hanger.

Use mylar whenever possible. This is  also not the way to use mylar. Lay mylar completely flat and unwrinkled.