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I would suggest one year of having a reef tank going before adding an anemone.

If I were to do it again, I would use pvc pipe maybe 2" or 3" diameter, maybe a 3" to 4" length of it with an end cap on it, find or make a crevice or hole in the rock to put the pipe in end cap down, choosing a nice locations for the display of the anemone. The BTA wants a location out of strong current, in light but not too strong, where it can keep its foot anchored in a dark and protected place. My BTA's unfortunately like to hide in the back of the tank. This way you could choose the location for your BTA ahead of time.