adjusting KH and pH in RO/DI water
I made my first batch of water for my tank today. I ran a GH test and everything came up perfect (thanks Equilibrium!). However, the KH and pH were off the charts--very low. I'm used to saltwater, where a good salt mix already has target levels, so I need to ask what is probably a really basic question. What is the best way to boost these with freshwater?