Never did find anything "wrong" with tank, regardless I fear all are dead now. And I'm now also having a snail outbreak ...
I think I'm going to wait a couple of weeks and try something new. The betta I got seems to prefer his bucket. I removed my goldfish and put him in the 20 gallon tank all by himself, he quickly found the bridge siphon and swam back to his bucket. This process has been repeated multiple times.
So I'm back to, what do I put in my ten gallon?
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