What fish are compatible with clownfish in a 36 gallon reef tank?

Most of the compatible fish are schooling fish that do best in groups of 4-8. This would include Neon Tetras, Ember Tetras, Harlequin Rasboras or White Cloud Minnows. That many fish may be too much for a 3 gallon tank. Other non-fish option include Ghost Shrimp, Zebra Snails or African Dwarf Frogs.

The Tang, Clownfish, and Chromis are marine fish requiring a saltwater aquarium while guppies are freshwater fish. These fish are not compatible as they require two completely different setups to accommodate their different environmental needs. If you are going to set up a marine aquarium - a 20 gallon aquarium is too small for the fish you have listed. A small Percula Clownfish maybe suitable in a 20 gallon aquarium temporarily, but be prepared to upgrade to a larger aquarium as it grows larger. In general, 50+ gallon aquariums are recommended to properly house marine fish as they tend to grow large and require plenty of room to swim. If you are planning to set up a freshwater aquarium, a 20 gallon setup is adequate to house guppies.

Bottom feeders such as plecos or corydoras catfish will do well in a tank of angelfish. Other community fish include silver dollars and the larger Tetra species. Monitor for fin nipping and remove fish if necessary. You have a lovely tank and the angels look very nice in it. Be cautious when adding fish as you may overload your tank. The angels will grow as will any additions and your tank may not be able to support the population. This could lead to poor water quality, aggression and sick fish.

Choose fish that are cold water fish. Goldfish do best in water that is between 65 and 75 F. Weather, or Dojo, loaches, Rosy Barbs or Zebra Danios are all potential tank mates. The loaches do best in groups of 3 or more. If you decide to add fish, consider a larger tank, at least 20 gallons. The reason is that goldfish produce a large bio load that can quickly lead to poor water quality. They also grow rapidly depending on the type of goldfish you have. A tank that is too small may cause stunted growth which can greatly decrease the life span.

Hi Tori, I have found that fancy guppies are pretty, fun, and small fish that would do well in a small tank. Mollies would be another good choice. A 3 gallon could probably support 3 or 4 of them well. Beta fish don't seem to care much about snails in My experience. Have fun!

Thanks for reaching out, the rule of thumb is 1" of fish per 3 gallons, but smaller tanks are very difficult to keep stable, and saltwater fish are easily stressed by environmental fluctuations (salinity, temperature, dissolved oxygen). Good luck.

Rainbow sharks are generally aggressive with other fish and are not a good match with peaceful fish. Tetras and guppies are generally fine to live together. When picking out fish, you want to keep a community that all have the same aggression levels. The store clerk will be able to help you with that information. I hope this is helpful and please feel free to post any additional questions.