I know that metals and fish don't play well together. My tilapia poop more than any animal I have ever seen before. I am thinking of running my return from the fish tank through a strainer to eliminate the heavy bits but I cannot find an alternative material. Will a food grade strainer be okay? I have another filter but it gets clogged every 12 hours or so. It is fed by gravity from the fish tank and not much distance from the drain to the ground/sump bottom. Thoughts?