Red Sea professional titrate calcium pro test kit is an advanced calcium titration test, measuring the level of calcium in reef aquarium to an exceptionally high accuracy of 5 ppm. This test kit enables the accurate dosing of reef foundation A (calcium/strontium) and reef colors supplements, which are part of the complete reef care program. The kit includes a durable, chemical resistant plastic case and analytical grade glass vials. The titrate also included inside is high precision and easy to use with one hand. It performs up to 75-tests.