API pH Down

API pH DOWN lowers pH to make freshwater aquariums more acidic for fish and
plants when levels rise too high. pH is the measure of acidic or alkaline conditions in
water, where a value of 7.0 corresponds to a neutral pH, pH values about 7.0 are
considered alkaline, and pH values below 7.0 are considered acidic.

Recommendations

Determine the pH of aquarium water with an API pH TEST KIT. To lower pH,
add 1 ml. for each 10 gallons of aquarium water. Some fish may be sensitive to
pH adjustments greater than 0.2 in a 24 hour period, so changes of this
magnitude should be done with extreme care.