Review on 🐟 API Proper pH 7.5 Freshwater Aquarium Water pH Stabilizer - 9.2 oz Container, Proper pH 7.5 Powder JAR - Small by Sarah Nguyen

Rather correct pH value 6.8! This does not work well in acidic water, even if the kH is high or low. The buffering capacity of this product is really bad. Acts more like an acid than a buffer. If anything, it may help those seeking an acidic to neutral pH. But that's not good for alkaline pH. My pH was already between 7.4 and 7.6 before using it and now it's fluctuating to 6.8 or less. The pH of the spring water is 8.2, so they got the correct pH of 7.5 wrong. I would like to return but I have already used the bottle. However, there are no buffers like this to achieve a pH between 7.2 and 7.8, so I can keep experimenting.