Abstract: A method and resulting structure are described for the production of refractory and insulative boards comprised of ceramic balls. Improved thermal, physical and mechanical properties are achieved as while also eliminating the safety and environmental impact of fibrous refractories. Also presented is an apparatus and method to remove bacteria and toxins (harmful or undesirable chemicals) from a water column utilizing porous ball-like or sphere-like structures treated with anti-microbial coatings are described. The balls so formed may be coated with a variety of anti-microbial materials and placed within a water or fluid column or water or fluid flowing system.