Unfortunately, even if you move it, anemones can be real buggers & move into the most inconvenient of spots.

I had my LTA hide inside a cave for almost a month. It shrank from a 12" monster to 2" before I tore the rockwork apart. After regular feedings with my 3mm NLS pellets (with an occasional piece of scallop or prawn), it's even more beautiful and expands to over 8" now (less than a month later).

I would recommend following Bev's suggestion and try moving the rock & attached BTA into a lower flow area & see if that helps.

Anthony