[Shrimplover]

Pretty much brand new Tropica C02 system bought from Aquariums West last year for $175 plus taxes
It's been great for my smaller tank but I've now upgraded and needing a larger C02 system.
It's practically brand new and asking for $125 OBO, really great for a smaller nano tank looking for a clean aesthetic look
Willing to trade for a new 5lb C02 setup that I can run my new ADA pipes, must be comparable in price or value for consideration.

Thank you

 

[outsider]

I believe Aquarium West sell the custom made adapter for tropica co2 regulator to be used with 5lb co2 tank, however you will still need to buy solenoid.

 

[Shrimplover]

Pictures...