API Saltwater Aquarium Salt Water pH Test KitAPI Saltwater Aquarium Salt Water pH Test Kit Features and Benefits: Maintaining good water quality is the key to successful fish keeping. The API Saltwater Master Test Kit is a complete kit for testing saltwater aquariums to protect marine fish and invertebrates from unsafe water conditions. The Saltwater Master Test Kit tests 4 key salt water parameters. The kit is highly accurate and economical, and includes 6 bottles of liquid test reagent, a