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Ammonia NH3 Test Strips, 0-6ppm for Aquarium, Fish Tank and Pond Monitoring [Vial of 25] bee06 HXINFU 3d Eye Mask ForAmmonia NH3 Test Strips, 0 6ppm for Aquarium, Fish Tank and Pond Monitoring [Vial of 25] Product Information Ammonia can affect fish growth, osmotic pressure balance, metabolic activities, and can cause some damage to fish. It is necessary to test ammonia for your fish regularly. A new aquarium should be tested at least 3 times a week until the ammonia level measures 0 parts per million (ppm) or mg L. In established aquariums, ammonia should be tested