You don't need an anemone for any type of clowns. The clowns will be just fine without them. BTW, all clowns are non-sexual at birth. The dominate clown becomes the female and the second dominate become the male. Once a female, the clown will forever be a female. Once a male, the clown can change to a female if left by itself. Two female will fight to the death. Any other two clowns will likely fight possibly to the death. The best way IMO, to pair two GSM clowns is to start with a female (you will know by its size and color and the amount of time left by itself without any other maroon clowns.) When the female has adequately claim the tank as hers add a second, non-sexual clown juvenile that is at least half the size of the female, or smaller, and much brighter in color. Place the new clown in the tank with a safe area, such as a small crate that the new clown can enter to hide from the female, but the female cannot enter to attack the male. This will give the new clown time to adjust to the fact this tank belongs to the female. Once you release the new clown, the female will fight with it. Hopefully the new clown will quickly succumb to the female. This is evident by the shuddering that occures. Once this happens the two are on there way to being a pair. At this point make sure to not interrupt the process until it is complete, which may take months.
Good luck as it is sometimes very difficult to pair maroons, even though mine pair within a weekend with no problems.
