Turnkey just add your favorite reactor media and fill up the co2 bottle and you are in business. This big GEO 8-18 reactor kept my calcium and alkalinity up in over 600 gallons well. I am switching to a dosing system so I am selling this reactor and regulator and 10lb aluminum co2 bottle as a complete setup for $450. I paid over $900 for it all and it's perfect! I will bring it to reefed this coming weekend if it doesn't sell before then.
