katiekelsey
Aquarium Advice Freak
Just purchased API test kit to test GH & KH for my freshwater tank. I always test for PH, Amonia, Nitrites & Nitrates but I'v never tested for GH & KH until now. Took 6 drops to change test tube water to yellow for KH test. And took 7 drops to chg test tube water to green for GH. What does all this mean?