BTA is one thing. Magnifica and Gigantea is another. They are big, require a lot of water movement. I am not sure that air stone alone is enough water movement for these two species.
I have a 48X18 12H inches tank divided into 4 sections each 12X18 12H. This is my brood stock tank for my clownfish. I will use this to keep 4 anemones. I will use 4 PH for circulation, block off with egg crate so that the anemone cannot get to the PH. Now I just have to get enough light for them. I will have a huge sump with sand and rock for filtration. I thinking of just get 2 Radions for this and mount each Radion to light two sections. That should be enough light. Neither species require sand so I can have something that they will attach to that is easily remove.
So far that is what I am thinking.