If you’re considering adding a Carpet Anemone to your already established saltwater aquarium, one bit of good advice might be – “Don’t”. If you insist however, at least be aware of some of the challenges or pitfalls that may await you if you introduce one of these beautiful animals into your tank. First of all, the Carpet Anemone is well named. Like a carpet, it covers a wide area. No matter what species of anemone you might consider placing in your aquarium, a rule of thumb is that an anemone can expand to a tremendous size and contract to a very small size indeed. It is the larger size that it may attain that you need to be aware of. A carpet anemone, which can at times measure up to three feet across, requires plenty of room.