Fritz KH Alkalinity Test Kit Algae Control solenoid and all accessories for

solenoid and all accessories for an automatic injection of CO2

magnesium oxide

especially for the young ones or the expectant

Methylene Blue is gentler on fish and eggs but less effective against advanced infections

Fritz KH Alkalinity Test Kit Algae Control solenoid and all accessories forFritz Liquid Test Kits Alkalinity East to Read Instructions Essential for a Healthy Tank Accurate in both Fresh and Saltwater About Fritz Liquid Test Kits Alkalinity Carbonate hardness, or alkalinity (KH), is the measure of both carbonates and bicarbonates present in the water. The KH value of your water is important to know, as the carbonate hardness plays a significant role in the waters pH and the waters buffering capacity to keep that pH stable.