I used it to check the pH of my seawater aquarium. The color difference between different PH values is pretty good, except for the difference between 8.2 and 8.4, which is just a slight difference in shades of the same color. However, since you want your saltwater pool to be somewhere between 8.2 and 8.4, this shortcoming has no real consequences.
Highly Efficient Seachem Purigen for Freshwater & Saltwater Filtration
9 Review
π§ͺ Enhanced API Replacement Test Tubes with Caps - Ideal for API Freshwater Master Test Kit - 24 Count Box
8 Review
π Seachem Stability 250ml: The Ultimate Fish Tank Stabilizer for Freshwater and Marine Aquariums
9 Review
Fish Water Quality API Test Kit
9 Review
𧲠Efficient Magnetic Fish Tank Cleaner: KEDSUM Floating Clean Brush with Handle Design
34 Review
Efficient 2-In-1 Magnetic Fish Tank Cleaner With Non-Slip Design And Scratch-Free Blades
37 Review
Mini pump Xiaomi Mijia Electric Pump 1S, plastic, black
55 Review
π U-BCOO Aquarium Gravel Cleaner Fish Tank: Manual Siphon for Efficient Filter Gravel Cleaning and Water Change in Tanks
22 Review