pH Down lowers the pH of Aquarium Water and contains no phosphates.
May be used in both fresh and saltwater aquariums.
No express shipping option
Directions For Use: 1. Use API’s Freshwater pH test Kit to determine the pH of the aquarium. 2. To lower pH, add 1/2 tsp (2.5 ml) for each 25 U.S. gallons of aquarium water. For larger aquariums at 1 tsp (5 ml) for each 50 U.S. gallons. 3. Take another pH reading before making the next addition of pH Down. 4. If fish are present in the aquarium, do not change the pH more than 0.2 in a 24 hour period (for example, from 7.2 to 7.0).