A Trudine 20 is usually referred to as a sulfur-containing amino acid but is technically a sulphonic acid derived from cysteine - a true sulfur-containing amino acid. Sanitizers make the water safe for swimmers, and they keep it looking sparkling clear too. However, sanitizers are chemicals and must be handled with care. The sanitizing is a unique and rapid technique to rid water of bacteria, viruses, micro-organisms, mold and algae without the use of heat or chemicals. The disinfectants are the major source of products used in households, swimming pools and water purifiers. The Trudine 20 is very effective and useful.