I haven't, if I can dig up my old Ca and Alk test kits and if they're still viable I'll post some numbers. The A.R.M. in my second chamber has gone down about 3" in 2 months so there's definitely some addition of Ca and Alk, but seeing as I have no corals in the tank to speak of I haven't been faithfully tracking those #'s, only the nitrates (which it hasn't done anything to reduce
- in fact, I'll update my other thread since it's been a while - but I'm taking mine offline).