She looks much better Pete. Great to see her doing so well. Nice job. Anyone who interacts with their rays properly knows that they can be trained to feed by hand or even target trained to eat. I can feed all my rays by hand with the exception of my flower, but marbles and blackies no problem. My female Marble will literally come a third of the way out of the water to get a night crawler out of my fingers.
How are the others? I know you lost one of the four.
Yes, the most emaciated one I couldn't do anything for, he was basically dead before he arrived.
But the other two are also doing well. The other female was also very skinny upon arrival and clearly showing signs of malnourishment - hips showing, body structure showing through her skin and her tail was basically permanently curled round. After some pretty intensive care, her hips are no longer showing, the tail is straight and she's putting on weight all over. So, the new tank should be these 3 plus the stunning male I got from JimR.
I can't wait to see the new 8x4s either (Yesterday I saw a couple mid-construction pics of one of them)
And yes, currently planning on plopping a 75 gallon tank between them and using it as a central filter (although only for the 2 8'x4' tanks). It will make things easier at water change time, if nothing else. My filter on my ~320 gal tank with the 3 Motoro and 1 Henlei is only a 30 gallon tank so less than twice as many rays and more than twice as much filter should still work fine. If I ever get to feeling the rays have outgrown the filter it would be easy to switch the 75 for a 125.