API High Range pH (Marine) Test Kit API High Range pH (Marine) Test Kit is a liquid aquarium test kit for measuring pH from 7.4 to 8.8, making it useful for marine aquariums, African cichlid systems, goldfish tanks, and other higher-pH aquariums. API High Range pH Test Kit for Marine and Higher-pH Aquariums Many saltwater and hard-water freshwater aquariums need pH monitoring above the range most low-range freshwater kits are designed to read. This kit is made for aquariums where pH is expected to sit in the alkaline range, helping aquarists spot instability before it affects fish, corals, or invertebrates. High Range pH Testing from 7.4 to 8.8 for Aquarium Stability Measures pH from 7.4 to 8.8. Suitable for freshwater and saltwater aquariums. Useful for marine aquariums, African cichlid aquariums, and goldfish systems. Helps monitor pH changes caused by fish waste, uneaten food, and natural acid buildup. Supports regular weekly pH checks in aquariums that naturally run higher pH. Liquid test format provides a focused high-range pH result. Includes two colour cards for matching results across appropriate aquarium types. API High Range pH Marine Test Kit Use Notes Product type: liquid high-range pH test kit Test range: 7.4-8.8 pH Use for: freshwater and saltwater aquariums Best fit: marine tanks, African cichlids, goldfish, and other higher-pH systems Recommended frequency: weekly pH testing Use the API Low Range pH Test Kit for typical freshwater systems that require lower pH measurement. API High Range pH Test Kit Directions Rinse the test tube before testing. Fill the test tube with aquarium water according to the instruction booklet. Add the high range pH test solution as directed while holding the bottle vertically. Cap and mix the test sample according to the instructions. Compare the colour result to the correct high range pH colour card. Record the result and compare it with the preferred pH range for the aquarium’s livestock. Rinse the test tube after use and do not pour test contents back into the aquarium. What's Included One high range pH test solution bottle One capped test tube Two colour cards One instructional booklet