Treating a sick aquarium fish can be hard, especially if you’re a new fish keeper and don’t recognize the disease. Even if you can identify that your pet fish has fin rot, cotton fin fungus, or white spot disease, it’s hard to tell what is the best fish medicine that will treat that particular fish disease. After consulting with ichthyologists and spending tens of thousands of dollars in development time and extensive testing, we narrowed down the search to three broad-spectrum fish medications. Mardel Maracyn is one of the best fish antibiotics for bacterial infections, Aquarium Solutions Ich-X is a highly effective ick treatment that also fights fish fungal infections, and Fritz ParaCleanse is an antiparasitic drug for treating fish tank parasites and tapeworms.
We personally use all three fish medicines on every single new fish that enters our fish store because preventative treatment against fish illnesses ensures that our customers get the healthiest fish possible. These fish medications work for all freshwater fish that have passed through our doors, and they’re safe to use with plants, shrimp, snails, baby fish, and even scaleless fish. We also recommend that fish keepers use this trio of quarantine medications with any new fish they receive to prevent the spread of common fish sicknesses. For more details on how to dose these aquarium fish medicines, read our article on how to treat sick aquarium fish.
If you live in a country that does not allow the purchase of these fish treatments, try using aquarium salt instead. Aquarium salt is effective against freshwater ich, mouth fungus, cotton wool disease, many fish parasites, and more. However, it is not safe to use with live aquarium plants, snails, and certain fish like anchor catfish. For step-by-step instructions, see our article on how to use aquarium salt to treat fish diseases.