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  1. Z

    CO2 idea...if you don't want to drop a lot of cash

    1st time here, i have a large tank cost 30-35 bucks to fill. I use a timer set to run every hour for 2 min.10hrs. a day, works great only use co2 when the lights are on and it last me two grows before it needs a refill, 10x10x10 room. and if the room has leaks then who knows what it would be...
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