API pH Test & Adjuster Kit \u2013 Tests & Balances Aquarium pH Levels Quickly | Water\n\nDirections: push down on cap while turning to remove childproof safety cap. Fill a clean test tube with 5 ml of water to be tested (to the line on the tube). Add 3 drops of pH test solution, holding dropper bottle upside down in a completely vertical position to assure uniformity of drops. Cap the test tube and invert tube several times to mix solution. Read the test results by comparing the color of the solution to the pH color card. The tube should be viewed in a well-lit area against the white area of the card. The closest match indicates the pH of the water sample. Rinse the test tube with clean water after use. A pH of 7.0 is ideal when keeping a community aquarium containing a variety of tropical fish. Goldfish and livebearers prefer a pH of 7.5. Many Amazonian fish, like angelfish and neon tetras, prefer a pH of 6.5 to 6.8. Mollies and swordtails thrive at pH of 7.2 to 7.5. To raisy