GUH! I was hit with a stroke of inspiration, or perhaps it was just an early stroke... I'm 28, but my body screams 70 ever since cancer. Anyways! Does anyone know an online supplier for aquarium safe acrylic and what tools are needed to cut and properly sand it? I just figured a way I want to try to seal the holes around the sump where an octo can't get in, but still let water flow through. ALSO need to know where I can get some netting that's not too dense to let waiste go through. Is nylon safe for a saltwater tank? What my plan is, is to make a frame from the acrylic to which I can cement the netting to and then cement it into the inside of the sump where the frame goes around the holes and slots and holds the netting over it.