If you are considering adding a second anemone to your tank, there are a few things to keep in mind. Anemones can be aggressive toward one another and may fight for space. It is important to provide each anemone with its own hiding place or cave so they can retreat if necessary. In some cases, two anemones will coexist peacefully, but it is more common for them to compete for food and territory. If you do add a second anemone, be sure to monitor the situation closely and be prepared to remove one of the anemones if necessary.