Some fish will turn your aquarium into a beautiful and peaceful biosphere while others into a chaotic boxing ring.
There are many factors to consider when selecting fish. You need to ensure that you have the experience to look after the fish you select, that the fish you buy are healthy, and that they are compatible with the fish you currently have.
As a starting point, it is very import that you only buy very healthy fish because the best way to keep strong healthy fish is to start with strong healthy fish. Buying a fish because it doesn’t look well or happy and you feel sorry for it and want to give it a better home in your display tank is not a very good idea. An unwell fish can introduce diseases into your tank that can infect your other fish, and may even cause them to die. It helps to become familiar with a species of fish before you buy it as this will allow you to be clear on exactly what it should look and act like. Ensure the fish looks alert with clean clear eyes, fins and scales. It is also important that the fish appears eager to feed and can maintain its position in the water column. And finally, as a precaution, only buy from a clean healthy store that you trust. » Read more: Selecting Marine Or Saltwater Fish
