The ideal pH value in a freshwater aquarium is between 6.5 and 8.5 depending on the species of fish. An increase or a decrease in this value can be very dangerous for the fish. This pH- solution lowers the pH level to the required value as desired.

USAGE INSTRUCTIONS:
2 ml for 10 litres and to be used till the desired pH level matched. Do not decrease the pH value more than 0.2 in a single day. ALWAYS use a pH test kit to measure the correct pH level.
Cap-full is 6 ml.