The KH/Alkalinity Pro Test kit from Red Sea is extremely accurate at 0.025meq/lElement : KHAccuracy : 0.025 meq/lTest Type : TitrationNumber of Tests : 75All Pro Test Kits come in a durable plastic housing and use optically clear, analytical lab grade glass test vials.- Easy to use \"drop and shake\" titrator. For use with all titration test with a high degree of accuracy.- Drop size of 0.01ml.Robust coral skeletons are essential for all reefs and only acheivable by ensuring the basic elements Calcium, Magnesium, Strontium and Carbonate are readily available and in the correct ratio to each other. If they are not in the correct ration the coral skeleton can form as a fragile calcite. Can also be used as part of the Stage 1 - Reef Foundation in the Red Sea Reef Care Program. The Reef Foundation Stage provides a complete solution for testing and supplemeting these foundation elements and allows the reef-keeper to take control of their aquarium.This products is part of the new Red Sea unique Reef Care Program (RCP), look out for other products from this range by choosing Red Sea - RCP under brand in the drop down menu at the top of the screen. The Red Sea reef care program is the result of over 5 years research from Red Sea scientists resulting in unparralleled understanding of the requirements of coral aquariums. The Red Sea Reef Care Program provides a holistic solution to maintaining a flourishing coral reef aquarium.It even allows beginners to achieve stunning sps aquariums safely.