API Copper Test Kit

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API Copper Test KitThe API Copper Test Kit measures the level of copper in aquarium water — important in two situations. If you're treating fish with a copper-based medication, thi s kit lets you maintain the precise therapeutic dose (too little doesn't work, too much is toxic). And if you keep invertebrates, it lets you confirm your water is copper-free, since copper is deadly to shrimp, snails, and other inverts even in tiny amounts.Good to Know: For a shrimp or snail keeper, this kit is genuinely useful peace of mind — copper can leach in from old plumbing, certain medications, or some tap water, and inverts are extremely sensitive to it. It's also essential for anyone running copper treatments in a fish-only/quarantine tank, where holding the right concentration matters. Good for about 90 tests.How to Use: Add the reagent drops to a tube of tank water per the instructions, wait, and match the color to the chart. Test during copper treatments to hold the dose, or to verify a tank is copper-free before adding inverts. Show more