Check the listing for details. Aquarium, API Proper pH Adjuster for Aquariums (pH 6.5 - 240 Gram Jar). Condition: New. Listed at 19.81 USD. Home About Us Feedback Add Us Description API Proper pH 6.5 Freshwater Aquarium pH Stabilizer sets and holds pH to 6.5 and resists pH rebound. pH is the measure of the acidity of water, on a scale ranging from 0-14. ApH of 0 is the most acidic, while a pH of 14 is the most alkaline. Water with a pH of 7.0 is considered "neutral". Along with keeping your pH at the correct levels Proper pH 6.5 also removes chlorine, neutralizes chloramines, adds electrolytes & detoxifies heavy metals in freshwater aquariums. It is perfect for soft water species including Tetras, discus, Rasboras, and Angelfish. * Sets & stabilizes pH to 6.5 * Removes chlorine * Ideal for Tetras, Discus and Angelfish * Use when setting up a new tank, adjusting pH in an established tank, and water changes Features: API Proper pH Adjuster for Aquariums pH 6.5 - 240 Gram Jar Pet Type: Aquarium Category: Water Conditioners Condition: New