most anemones get far too large for a 10 gallon, with the exception of mini carpet anemone
how long has the tank been set up? what else do you have in there? what kind of lighting do you have?
Tank has been up for 8 months, and 1 clown, peppermint shrimp, Pom Pom crab, blue tuxedo urchin.. Corals: hammer, small cluster of zoa's, brarium, organ pipe, Duncan , ricordia mushrooms , I have pics on my profile of AA.. And I have t5ho's
how many bulb fixture? your lighting may not be strong enough if its a dual bulb