It works and gives you a great reference especially when you are in a hurry! For more accurate measurements, you need to use a photometer.
FUNSWTM 7 in 1 Aquarium Test Strips: Accurate Water Testing for pH, Nitrite, Nitrate, Chlorine, GH & KH Levels
8 Review
๐ฆ Comprehensive Water Quality Analysis: ICP 33-Elemental Test Kit - Single Sample Kit
9 Review
Fish Water Quality API Test Kit
9 Review
Fluval A7551 CO2 Indicator Kit
9 Review
๐งฒ Efficient Magnetic Fish Tank Cleaner: KEDSUM Floating Clean Brush with Handle Design
34 Review
Greenpro Micranthemum Monte Carlo: Live Large Pearl Grass Aquatic Plant In Tissue Culture Cup For Freshwater Fish Tanks And Aquariums
49 Review
๐ U-BCOO Aquarium Gravel Cleaner Fish Tank: Manual Siphon for Efficient Filter Gravel Cleaning and Water Change in Tanks
22 Review
Vacuum cleaner TEQQO Aquastick 3 in 1 Power, grey/turquoise
26 Review