Pre Poo and co washing are basically the same. Some companies give their products different names but the same process applies. They are commonly called: • Pre Poo • Co Wash • Co Washing Conditioner • Cleansing Conditioner • Conditioning Cleanser Some people will pre-poo with a co wash before using a regular shampoo. While others may only pre-poo with a co wash, which replaces their shampoo, then use a conditioner. It comes down to personal preferences but they are one in the same.