Hey everybody. I found metal shavings, or what I think are metal shavings in my substrate. The magnet fell onto the substrate which it does often and when I pull it out, I found metal shavings or what I think are metal shavings stuck to the magnet. The system is about two weeks old and I put the seafloor in, about a week and a half ago. Has anybody else experienced this? Are these metal shavings or is it just magnetic rock? I ran the magnet through the sand for about a half an hour and continue to find things stuck to the magnet. It appears I got most of it out, but just curious what the community thinks?