update
update
Wanted to drop in and give an update, as you all have been so helpful. I truly appreciate it!
The haddoni was moved to the 55. I addressed the lighting issue by adding a small light fixture over the area where she is. It is an extra that was on the 12g tank in my husbands office that cracked over the summer. It's not pretty, but until we can get the new tank purchased & have it running for a while... this is the solution.
The clowns seemed to know the carpet needed some time. They were interested & would 'test rub' but never agressive-as goldbars can so often be.
This morning, we woke to see the clowns happily snoozing in the carpet.
She is standing straight up, mouth tightly closed and swaying with the current.
I will be sweeping sand around her foot when the kids break (we homeschool) and go outside.
Is there anything else you feel I am missing?
As today is the first day her mouth has been tightly closed, should I offer krill bits? or wait another day?
Also, the 2 black saddles we bought for the hadonni died within hours of taking it out of the small tank. We tried everything to save them. It was awful

We have also lost 2 green chromis and our diamond goby, all 3 from the 55. I am going to assume they must have touched her. The foxface lost color for about an hour, but has since recovered.
We are opting to leave the 14 gal in the living room a coral only tank for now... I want to eventually add another pair of black clowns-with a bta, this time. But first, we are wanting to spend a few months monitoring the water. After reading many articles on Ph drops, at this time, we are leaning towards aeration as the cause. It is a completely enclosed system, so we have added an airstone (per an article in reefkeeping) to the first chamber of the filtration system---now wondering if I'll ever get used to the slight bubbling noise!
Again, thank you all!