Turtle and fish question

I'm not sure if this is the right place to ask Will livestock
water tanks work for fish or turtles, or are the materials
they are made of potentially toxic? I would think that
that livestock water tanks would be made out of innert
material but I wouldn't want to assume that. I do know
that fish are far more sensitive than, say, a cow would
be.

Thanks much for any help.

--Julie