I am new here and joined just to find an appropriate home for a Pacu, which I successfully did. In doing so, I became interested, or shall I say curious, in making my own outside fish pond. But I am hoping you all can help me with a few things before I start. I have two options for my starter pond, an old weathered (somewhat rusty) 100 gallon cattle trough and an old claw foot bathtub. The cattle trough is the most accessible and what I would like to use, but can fish live in weathered galvanized metal containers? Any tips or suggestions would be appreciated.