Api Water Test Chart. We highly recommend testing your aquarium or pond water regularly, to ensure it remains a safe and healthy home for your fish. Testing of levels such as ph, ammonia, and nitrite can help you determine whether you may be overfeeding, and alert you to any potential issues early, when they are more easily treatable.

Testing of levels such as ph, ammonia, and nitrite can help you determine whether you may be overfeeding, and alert you to any potential issues early, when they are more easily treatable. We highly recommend testing your aquarium or pond water regularly, to ensure it remains a safe and healthy home for your fish.