Hydroponic Grow Equipment- CO2 Tanks 20

I am selling a complete set of hydroponic and other grow equipment for my friend. I will be listing much more in the next day or two. It will include ebb and grow set ups, EZ-Clone 60, large and small reflectors(both air cooled and not cooled), 4` T5 fluorescent 8 bulb fixtures, HPS and metal halide lights (some unused), switchable magnetic and Lumatek dimmable digital electronic ballasts, vortex blowers, wall fans, CO2 monitoring and distribution equipment, CO2 regulator, large carbon filters, lots of various size plastic pots and grow bags, lots of ducting, various nutrients, multiple outlet programmable digital timers, etc. Contact me if you want info on something asap.
This listing is for two 20# CO2 tanks. One is empty and one is full. These normally sell for $150 to $164. I am asking only $99 for the empty tank and $119 for the full tank.