Introducing New Fish into Your Aquarium
Building and maintaining a successful aquarium depends largely on knowing and following best-of-practice procedures based on the collected experience of experts and enthusiasts.
After outfitting your tank with the necessary equipment to establish the optimal environment for your aquaria, the next step toward success is selecting the species that are compatible with one another.
Our Compatibility Charts will help you select new fish that are most likely to successfully co-exist with established tankmates. Understand that the chart is a guide only and that fish, like people, are individuals with distinct "personalities". A particular fish may react differently than what is indicated in the chart when exposed to an unfamiliar environment.
In terms of compatibility, remember that the larger the aquarium, the easier it will be to mix fish with different behaviors. Many species are very territorial, and even more passive fish can exhibit territorial behavior if you try to maintain too many fish in an inappropriately sized aquarium. Also, a fish's behavior will change the longer it is kept in captivity. It is advisable to add smaller, more passive fish first, gradually working up to larger, more territorial fish.
Introducing New Fish
After following the step-by-step Acclimation Procedure for your new fish, here are a few tips we recommend to make the transition to its new home as stress-free as possible for your new tankmate:
By following these tips and adhering to the other pre-introduction principles of proper selection and acclimation, your new and existing tankmates will have the best possible opportunity for a smooth transition with minimal stress.