Making some new salt water, using Reef Crystals. Testing I see the KH is real low. Yellow on the strip, like zero. The water I've been getting at my LSF KH usually test at 120. What can I add to raise KH without throwing everything else out of whack. Everything else looks pretty good, PH may be a little low, looks around 7.9. If I add a teaspoon of PH Buffer to a jug will this raise KH as well as PH. This is a 60 gallon sumpless FOWLER with some Softies and a few LPSs. Sorry for the noob question but I've been out of the hobby awhile.