Features: - No Mixing Necessary - Easy Dosage - Highly Concentrated - Developed According To Latest Research Results - Calcium Supply Without Ion Shift - Helps Reduce Water Changes - Including All Vital Trace Elements - Optimum Coral Growth 300% Concentrate Ready To Use Ph-Fix Content: 2 X 2 L - 2 Litres Kh Component Blue: Ph-Buffer + Iodine And Fluorine Complex - 2 Litres Component Red: Calcium, Magnesium, Strontium + Vital Elements