I have always added DI water to my tank but recently I lost my source for the DI water. I was told to go to WalMart and get my water there. When I got there I noticed they had a few different types but none of them were DI water. They had distilled water, purified water, and drinking water that had been through the R/O process. Which of these is the best? There reason that im asking is that im seeing a big increase in my KH. instead of being between 8-10 it is over 14 and I cant seem to get it down.
Thanks
Thanks