All-in-one pool maintenance solution in a convenient 4 Week value pack. 5 compartment dispensing unit. Action - Once a week hassle free application. - Brilliant results guaranteed. - Shock treatments helps clear cloudy water, kill bacteria, control algae and improve pH and Total Alkalinity control. - More gentle formula for a healthier swimming environment. - Childproof packaging. - Does away with regular maintenance associated chores. Advantage - User friendly, compact packaging - New improved design for even easier application. - Easy to follow instructions - Now pour directly into the pool weir! - Measured dosages, no fuss and no mistakes. - 1 x Booster (only used once a month). - 4 x Weekly maintenance dosages (Calcium Hypo Chlorite). What's in the box 1 x Blu52 - Up to 75000 Litre Pool Month Pack