Hi Juergen, Just a few questions: 1. what size Kati & Ani are you using? 2. do you know what level of TDS (total dissolved solids) is in your water? 3. how much acid & caustic soda flake do you use per recharge? Cheers, Victor Eng Vancouver, British Columbia, Canada engfam@axion.net ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://www.digital.com for "Apistogramma Mailing List Archives"!