Your marine friends need safe， toxin-free water to grow and thrive in， so make sure their home is safe with Salifert Aquarium Copper Test Kit. Fintastic for measuring the levels of copper in your freshwater setups or pond’s water， this test kit can accurately and immediately perform checks up to fifty times， meaning you can rest easy knowing your pals are swimming in safe water for a long time to come. These tests can detect copper that is often found in untreated tap water so you can make sure you’re giving your fish， plants， and other marine friends the best water so they can swim about happily and healthily.