Should I supply c02

I'm looking to start a small closet grow with just one plant and 150 watt hps light to get my feet wet. Which leads me to two questions. 1) do I need supply c02 to the one plant or is that a waste? 2) do I need ballast to run such a low wattage light.

the ballast should be already built in, i started with a 150 and it was all one piece. CO2 is never wasted, but for one plant it isnt necessary

co2 levels are higher at night so its better to run lights on at night and its cooler at night. if u really want co2 try lemon juice and baking soda! theres a cool baggy method with lemons and baking soda or somethin like that

no on co2. yes on ballast for hps.

Is the room sealed, are you going to be in the room often? You can't breathe it.

it dont have to be a sealed room to use co2

jjbel said:

it dont have to be a sealed room to use co2

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no it doesnt have to be a sealed room to use co2 but it does need to be a sealed room to benefit from using co2. With 1 plant and 150 watts dont bother with co2, just get good fresh air coming to plant. most ambient air is 300-500ppm co2 and that is plenty.