Hey guys, new reefer here with a 75 gallon tank using 2 tidal 75 HOB’s as I cannot use a sump. I’m wondering what should be in the filters to provide optimal mechanical filtration? Currently I use a sponge, filter floss, and bio media and my tank always seems pretty dirty it has never been crystal clear and my filters get dirty pretty quickly too. I have live rock and sand so do I need biomedia in the filter?