why does everywhere I read suggest lowering the pH by using brewin salts? Most are pretty much just spectator ions and barely affect (if at all) the H+ concentration. Ex gypsum...CaSO4, add it to increase Ca+2.. cool, add it to increase SO4-2...also cool. Why are so many sources online saying it will decrease pH? It’s pka is 7! From my understanding if you want to lower the pH, add an acid, salts are buffers. Sure salts can be slightly basic or acidic but never as potent as their acid or base counterparts, to the point where it’s pointless to try and add these salts for anything except to change the mineral content.