can this tank be saved?
I'm new to this forum, but not new to freshwater aquaria. I'm a teacher, and I found in one of our storerooms a really old aquarium (probably as old as the school-40 years) It's about a 40 gallon tank with a rusted metal frame. The bottom appears to be slate. It doesn't appear to leak, at least for the short time I put water in it, but the caulking is old and looks it. It has years of dust and grime on it, not to mention hard water stains. Just washing it with plain water didn't help much. I'd like to have it for my classroom, but not if getting it cleaned up is a major undertaking. It doesn't have to be a thing of great beauty-the fish take care of that! Can I clean off the rust, and if so, with what? Should I remove the old caulking, or just E-6000 over it? I've used E-6000 successfully to repair minor leaks on other aquaria, so I know it's safe.