HOW TO USE: Add 200ml to your waste tank and top with 800ml of water. Use this product every 4-5 days to keep foul odours at bay and ensure waste is thoroughly broken down. NON STAINING: This non staining formula is biodegradable and contains premium UK sourced raw materials. SUITABILITY: Compatible with all caravans, motorhomes and portable toilets. FRESH FRAGRANCE: Our formaldehyde free formula effectively breaks down all waste and removes any nasty odours, whilst our pure essential fragrance oils provide a pleasant fragrance to envelop your smallest room!. BLUE TOILET CLEANER: is a premium concentrated and pleasantly perfumed liquid specially developed for chemical toilets in the camping, caravanning and boating leisure industry killing 99.9% of germs.