Aquarium PH levels - pH is simply the level of acidity or alkalinity of water. The level of water's pH can range from any where between 1-14. Water of pH 7.0 is called neutral and is neither acidic nor alkaline instead a balance of both. pH levels above 7.0 are considered alkaline and those below 7.0 are acidic.

In aquatic environments, animals generally prefer neutral water. In freshwater the pH is typically about 6.5-7.0 with only a few species able to survive outside this range. For marine species the range is even more fine - the pH level MUST be highly alkaline, that is, 8.3 ± 0.2.

All aquarium specialty stores will have pH testing kits that you can use in order to test the water.

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