When you bring a new fish into your home, you want to make sure that it is healthy and will not introduce any diseases into your aquarium. There are a few things you can do to help keep your fish healthy and biosecure. -The first step is to quarantine the new fish in a separate tank for at least two weeks. This will allow you to monitor the fish for any signs of illness and will prevent the spread of any diseases to your other fish. -You should also make sure that your aquarium is clean and well-maintained. A dirty aquarium can provide the perfect environment for bacteria and other pathogens to grow. Make sure to clean your aquarium regularly and change the water frequently. -You should also use a quality filter to remove harmful toxins from the water. A good filter will help keep your fish healthy and reduce the risk of disease outbreaks.