The black ear lived to see an upgrade! Not to 6000 gal but at least to 1800 gal. I took it out from the 240 gal, cut off the black sack on its snout, which I thought was a blister it rubbed when it was pacing in the 240 gal for the first several months before calming down but that thing turned out to be now like a bone, or is a bone, or very hard cartilage. It was very hard to cut off. I did it anyway.
Here is the release into the 1800 gal, 16:25 - 17:00 minutes:
Here is the release into the 1800 gal, 16:25 - 17:00 minutes: