24g aquapod with 150w HQI would be just fine for BTAs. I would replace the stock pump with a MJ 1200 and add a hydorflo on the output for random flow. these are plug and play upgrades.
If you want to do more, you can drill the false wall and add two or three more 1/2 inch bulkheads with MJ 900s.
With a system this small though you will need automatic top off and a chiller or fans to provide the stability that an anemone needs.
Another important point is that if the anemone won't be the focal point of the system, don't bother getting one. In a system this small there isn't room for much else!