With the upcoming power buy at BRS, I see this as a likely oppurtunity to finally break into the world of calcium reactors. I'd probably go with the dual chamber octopus if I decide to get one from them. Does anyone have any experience with these at all? If so, what did/do you think? Depending on how the finances play out, I might be able to get the regulator and the canister as well. Would I need anything else after that? Also, I've got quite a few snail shells and stuff I'd kept for hermits. Can some of the bigger ones be used up as media?