Do you have a first Aid Kit for your aquarium? Begin your collection by adding The Red Sea Phosphate Test Kit. This is part of the Marine Care Program which includes 100 colorimetric tests in total. This kit provides a quick and accurate 0.1ppm PO4 measurement for your aquarium and can work with Red Sea's Nitrite/Nitrate test kit. Always make sure you have the tools necessary for testing and treating your aquarium; especially for an unexpected emergency.