Physics is NOT my expertise, so I'm hoping someone will agree or disagree.
But if you have a small bucket and a swimming pool, you might be able to demonstrate what happens in the confusing case.
I think that as soon as it STARTS to sink, it will sink faster and faster.
It won't seek out a depth at which something balances something else (I think).
But how many deep-sea fishermen who use nets hang out in ATP?
Any recent phyzzies majors?