Automatic Litterbox Central

Ok all these so called reset devices say they have suggested replacement solutions. I know what reset device I am getting,
( http://www.smartcartridgereset.com) I know I am setting up to directly pump solution directly to the unit bypassing the cartridge but still need the cartridge so the solution is injected. But what I need is Input from the other CG owners that are reusing the cartridges. What solutions are you using, why, and were do you get it from. Please only people that are actual using another solution chime in. I have 2 to 3 months of CG solutions left before I need to modify and need to save 1 cartridge just in case I have to send unit in for warranty repair. I am trying to go green as possible. litter in the land fill is bad but large chucks of plastic from empty solution containers is not much better. At least the pellets come in a paper box. One more thing, I have had surgery on my noise so I cant smell things right . What scent in the scented solution CG sells.
CG GO GREENER! Me