Instant Ocean Test Kits By Aquarium Systems make saltwater testing easier than ever before for the beginning hobbyist as well as the experienced aquarist. The Instant Ocean Test Kits one piece color chip comparator is easier to use than any other saltwater test kit available. Foil packets protect the granular reagent test chemicals from light and moisture and keep them fresh indefinitely. Ideal for use with all marine, reef and aquariums. Durable Measuring Vial for accurate, easy loading. Dropper-Top Reagent for easier water testing at all levels. Foil-Sealed Granular Test Chemicals for lasting freshness and easy-pour, quick-dissolve. Step-by-Step Test Guide for quick, mistake-proof testing.