looking into getting a calcium rx and looking at the aquamaxx s 2 or the koralin 1602. anyone use any of these? pros or cons? I was told the aquamaxx is a bit noisy and ph probe holder didn't fit a probe so well. any thoughts? thanks. what other models would be "good" to use, I have 85g with very minimal corals right now but plan on a sps/lps mix reef. also no I wont be dosing