Aquatics > Additives & Conditioners > Freshwater JBL pH-Plus (100ml) Price for 1 pc(s),27.50 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.: 100-501-016 Safely increases pH and KH Reduce CO2 and KH values leading to an increased pH level. JBL pH-Plus Safely increase the pH of water 10 ml for 40l water increase the total alkalinity or KH (Carbonate hardness) by about 1 ° GKH. JBL CalciuMarin should be used to increase KH and calcium in seawater. Always test the pH-value before and after any changes are made. It is always very important to determine the KH value, which stabilizes the pH-value in advance. With a KH under 4 °dKH the pH-value is so unstable, that the slightest increase in PH or CO2 values can lead to serious problems.