Review on 🌊 Aquarium Water Test Kit - API Carbonate Hardness Test Kit by Dana Martin

Works very well BUT I misread the instructions so I thought my dhc was very high (but it was actually low) so I "lowered" it further and it became so low that my reef crashed. So be very careful. Luckily I have a new riff and now I know how to test it properly! How to check: 1 drop = 1 dkh 2 drops = 2 dkh and so on. Add more drops until the blue turns yellow. Count each drop and say if you add 9 drops it is 9 dkh.