Bio-Fresh is an ingenious microbial toilet cleaner and deodoriser. Instead of using harsh chemicals, it contains friendly bacteria which digest the uric acid found in human waste, naturally removing dirt and smells. It carries on working long after use, reducing the build-up of uric acid and keeping your toilet area hygienic and fresh, even penetrating and removing ingrained odours in grouting and other porous surfaces. Its harmless micro-organisms mean that it’s safe to use in microbial systems such as septic tanks and waterless urinal systems. pH 6