The Weald Aquatics Blog - Water Testing in a Freshwater Aquarium - another blog post from Weald Aquatics | Aquarium & Pond Fish Shop in Kent


Coolings Green & Pleasant
Main Road, Knockholt, Kent TN14 7LJ

01959 532 963

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Water Testing in a Freshwater Aquarium

Blog post written by Gary | 16 February 2018 | Category: Aquarium maintenance

The main factor in successful fishkeeping and fish health lies in the maintenance of good quality water.

Aquarium water can be very deceptive. It can be crystal clear and yet be toxic to the fish or it can be cloudy and be safe for the fish. To check if your water is okay for the wellbeing of your fish you will need to test for the most common parameters which can affect the quality of the aquarium water.

Ammonia, nitrite, nitrate, pH, GH and KH are the 6 key parameters to test in the aquarium. Phosphate is another parameter to consider.

Test kits are available as test strips, liquid test kit, or tablet test kit. Test strips usually have 6 tests on one strip allowing you to look at nitrite, nitrate, pH, KH, GH and chlorine in one test with the results in about 30 seconds. Liquid and tablet test kits are individual tests which can take up to 10 minutes before a result of the water quality is known.

Liquid and tablet test kits are normally more accurate than the test strips and work out cheaper per test as you can get 60-80 tests from a test kit. The only problem with liquid and tablet test kits is that they take up a lot of room in the aquarium cabinet. Liquid and tablet test kits can also be purchased as a combined test kit containing the 6 key parameter tests which works out cheaper against buying the kits individually.

All test kits contain full instructions detailing optimum levels and suggestions for correction, along with test tubes, test tube racks and colour-coded stickers for conducting the same test in the same tube to avoid contamination.

Here at Weald Aquatics we also test customers’ aquarium water. If you are worried about your aquarium water please bring a sample in to us and we can check and advise on any problems shown up in the test.


Ember Tetras
Using a test strip to test different water parameters