API Nitrite Test Kit Freshwater Fish Includes a replacement safety screw

Includes a replacement safety screw

Provides trace elements

because should it inflate with air rather than water it could experience massive problems expelling the air

It is a highly concentrated liquid option for reef aquariums where corals and other calcifying organisms consume calcium and carbonates through growth

API Nitrite Test Kit Freshwater Fish Includes a replacement safety screwAPI Nitrite Test Kit API Nitrite Test Kit is a freshwater and saltwater liquid test kit that measures nitrite from 0 to 5 ppm, helping aquarists monitor cycling, biological filtration, and invisible water problems that can harm fish. API Nitrite Test Kit for Freshwater and Saltwater Aquarium Cycling Nitrite is produced as part of the aquarium nitrogen cycle and can rise when fish waste, uneaten food, or biological filter imbalance affects water