The pH level in your freshwater tropical fish tank effects many aspects of your aquarium water. Aquarium pH levels that measure below 6.0 will slow the Aquarium Nitrogen Cycle. The beneficial bacteria needed to convert the poisonous ammonia must have a pH above 6.0 to thrive and multiply. read more
PH is measured on a non-linear scale of 0 to 10 but 5.5 to 8.6 is the range suitable for most aquarium fish depending on their natural biotopes. 7.0 is often cited as a good median point. African fishes natural habitat is a high Ph however most African cichlids are raised in Florida not Africa. read more