Hey guys, I am doing some upgrades and one being an ATO. I am looking for suggestions for a good ATO, looking at JBJ or Tunze osmo. I'm also considering using kalk but not sure of the best way to use it with an ATO. My thoughts are to use a kalk stirrer in the ATO reservoir. I have lower PH around 8 and would like to be certain my calcium is steady. I'm also a bit confused as to how an ATO maintains a stable salinity when adding straight RO/DI without any salt mix. I know salt doesn't evaporate but adding 5 or 10 gallons must drop the salinity over time. I must be missing some facts here and before putting out another few hundred bucks could use some tips and suggestions. Thanks!