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Some substances can hinder the formation of biofilms. By using these substances, we can slow or prevent biofilm growth on those objects. This is important in many industries. For example, biofilms quickly form on the bottoms of boats sitting in the water. By using paints made with special chemicals or more environmentally friendly hot pepper sauce, boat owners can protect their boats from microbial colonies that cause boats to drag and that could damage the hull. We use chlorine in swimming pools to prevent colonies of algae and bacteria from forming on the pool sides and bottom.