Horti Control Dust Shroom HEPA FilterThe Horti Control Dust Shroom is a reusable foam HEPA filter designed to keep unwanted pests and pollutants out of indoor gardens and air cooled reflectors! The Dust Shroom is a patented foam HEPA filter designed to keep dirt, dust, mold, mildew, pollen, and pests out of your indoor garden, greenhouse, air cooled reflectors, and carbon filters. Designed and manufactured in Fullerton, Ca by UNI Filter, the world leader in foam design. Keeping fresh air