It’s a cast iron trough, so rusty, but I could clean it down. It’s about 4 foot long.Welcome to the forum! Is this a porcelain coated cast iron tub or just bare iron? Could you also tell a little more about the tub such as gallons it will hold etc? An image would help too.
Yeah, you’ll need to sand off any loose rust, seal it using some fish safe sealer, I’d try something like the marine epoxy paint to start. This will protect the fish as well as prevent the whole tub from turning into pure rust and falling apart. As pretty as that thing is, I’d seal it inside and out, but I don’t envy you the rust removal project. I just did a metal frame for my mini pond, my arms hurt and I had rust everywhere!
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