I have certainly considered it. My ca alk demands have been pretty low, so I don't really feel the "need" on that end. In fact I only add 70 ml of each per day...that being said I am adding another frag tank soon, and I have always liked the idea of a carx. If I were to luck my way into a nice regulator I might keep my eye open for a decent reactor. Seems like there may be a few more "affordable"feed pump options these days like the kamoer, so I feel like if the longer term reviews of those are positive that makes it a lot more feasible for me. Certainly not being in a rush is helpful in being able to wait for a good deal to slap me in the face on a nice regulator. I do have a 20 pound co2 bottle sitting around.