API pH Test Kit

The API pH Test Kit uses a liquid reagent to deliver precise pH readings in the 6.0–7.6 range, ideal for most freshwater fish and planted tank setups. A single drop of reagent into a water sample produces a color that is matched against the included chart for an immediate reading. This kit is perfect for routine pH checks after water changes or when fine-tuning water chemistry with pH buffers. Each kit contains enough reagent for approximately 250 tests. The liquid test method is significantly more reliable than paper test strips for detecting subtle pH shifts.