Is pH Important?
pH (little p, big h) is a measure of the acidity or alkalinity of water, seven is neutral, less than seven is acidic and over seven is alkaline.
Most fish prefer to live in a range of between 6.5-8, but some will only do well in acidic water (6-7) or alkaline water (7.5-8.5)
Whilst pH is important, many fish keepers pay more attention to pH when there are other factors of water chemistry which could be considered far more important, such as ammonia, nitrites, and nitrates.
Keeping a stable pH level is more important then the actual level, since many fish can adapt to the pH level, but not to fluctuating conditions.
Regular water changes to replace lost minerals will help to maintain a stable pH. If your source water is very soft, you may find you need to add additional mineral to your water in order to keep a stable pH. Your retailer will know about the water conditions in your area and the fish they sell should be acclimated to those conditions.
For more information read our article on Water quality and testing