I've never had to test water and when I started searching I found all sorts of tests with recommendations, varying prices and not much absolute consistency on the type and manner in which any of it was presented. (As you would expect in a free market that's gone wild west.) I only tried two of the tests in this kit because they didn't match the color of the instructions. Gray not pink etc. Very good value set compared to others but if you can't trust the results.
π Hanna Marine Alkalinity Checker HC - HI772: Accurate & Efficient dKH Measurement
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Fish Water Quality API Test Kit
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π¦ Comprehensive Water Quality Analysis: ICP 33-Elemental Test Kit - Single Sample Kit
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π Seachem Stability 250ml: The Ultimate Fish Tank Stabilizer for Freshwater and Marine Aquariums
9 Review
Jasonwell Magnetic Aquarium Fish Tank Glass Algae Cleaner - Floating Brush (L Size)
37 Review
Vacuum cleaner TEQQO Aquastick 3 in 1 Power, grey/turquoise
26 Review
π U-BCOO Aquarium Gravel Cleaner Fish Tank: Manual Siphon for Efficient Filter Gravel Cleaning and Water Change in Tanks
22 Review
Mini pump Xiaomi Mijia Electric Pump 1S, plastic, black
55 Review