Tank is about 18 months old. BTA has been in it for 5ish months, always doing fine. It found a spot within 48 hours and stayed there the entire time until this week. It split once maybe 2 months ago, but was bubbled up and looking pretty after that. Sal=1.026, Ca=420, alk=7.3, mag=1390. Nitrate and phosphate kits are in the mail. The split new later split again, and all three look the same. Some tentacles are deflated, others partially inflated. Now the original nem is starting to walkabout.