I strongly suggest to anyone interested in anemones to invest in a small hospital setup and stock antibiotics, especially if they are interested in carpet anemones due to how common infections are.
It's best to have a mature and stable system with quality (t5, led or MH) and sufficient light and make sure you have room for how big they get, not how big it is when you buy it. Even bubble tips get 12"+ in six months in a happy tank.