Quote Originally Posted by Aloha_Shooter View Post
A lot of them, yes. I saw calcium deposits but only after I'd left the secondary charcoal filter in the pitcher much longer than I should have. The agent that delivered the CPAP had said the instructions say to use distilled water but she used a Brita. The Lifestraw Home is much better than a Brita because all the Brita removes are lead, copper, large mineral deposits. The microfiber filter on the Lifestraw Home (like on the Sawyers) removes particles down to 0.1 micron while (as I understand it) the charcoal filter removes dissolved solids.
We just use distilled water in ours.