Very interesting external fuge... can share where to get and cost?
I have an rbta in my 34L Ocean Free and i am running a koralia nano. My rbta hasn't moved since day 1. The trick is to place the anemone in a place it will feel comfortable since day 1. In my limited experience, btas like places with direct light, high flow, and there must be a deep crevice it can stick its foot securely into. With these conditions in place, the bta should secure itself and not move.