Aquatics > Additives & Conditioners > Freshwater JBL pH-Minus (250ml) Price for 1 pc(s),48.50 AEDincl. VAT Amount Earn points: - Read more Customers service 04 887 8218 Convenient delivery right at your doorstep We deliver to all 7 Emirates Earn points today, spend them on your next order. Terms apply Product no.: 100-501-015 Safely reduce pH level in aquarium water Phosphate-free preparation to safely reduce the pH level. JBL pH-Minus Reduce pH-Level of water. The total alkalinity or KH (Carbonate hardness) should be checked and adjusted to 4 - 8° dKH prior to use. Before changing the pH-value, it is advisable to address the issue. The pH level can be lowered by adding CO2 (carbon dioxide), by means of JBL pH-Minus. It is always most important to determine the KH (carbonate hardness) which stabilizes the pH-value in advance. With a KH under 4 °dKH the pH-value is so unstable, that the slightest amounts of pH-Minus or CO2 can lead to serious problems. Contains a natural oak extract.