Water test kits Saltwater test kits  Freshwater test kits Correct water conditions are essential for the health and development of both fish and plants. A stable pH maintained at the natural level for specific aquarium inhabitants, is essential for their well being and therefore should be checked regularly.  Red Sea`s Test Labs come in a unique package that easily transforms into a user-friendly workstation. The wide color graduations of the tests have been developed for easy determination of the result.