JBL pH-Minus (Fish , Maintenance , Water Maintenance) 250 ml

pH- / KH- reducer Phosphate-free preparation to safely reduce the pH level. Any pH influence should be tested with a pH test. With natural oak extract. Before use the KH should be checked and adjusted to 4 - 8 GKH. (with JBL AquaDur plus) To check the lime content of stones (add a few drops of pH-Minus to the stone: the development of foam indicates lime).