Aquarium

Freshwater

Freshwater products

Water Testing

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. If your water tests show that any of your water parameters are very high or very low, it is important to take steps to correct conditions for fish health and wellbeing. Monitoring the water chemistry of the aquarium or pond will allow you to catch problems before they develop. Browse the wide variety of testing options to ensure a better underwater world for your fish!

By providing your email address, you confirm that you are over 16 years old, and would like to be kept up to date with exciting promotions and new product developments from Mars Petcare and its affiliatesOpens in new window.

You may change these preferences at any time by clicking the unsubscribe link in any communication you receive.

From time to time, we may use your data for research to enhance our product and service offerings. You can find out how Mars Petcare and its affiliatesOpens in new window collects and processes your data, contact us with privacy questions, and exercise your personal data rights via the Mars Privacy StatementOpens in new window.

Need help button