The system is designed to filter up 50 m3/h of water. According to USPH 2018 rules this filter is capable to treat pools having a total volume up to 120 m3. Filtration system is composed of one multilayer sand filter technology. Water is drawn from compensation tank by means of one pump of proper capacity and characteristics and sent back to swimming pool through filtration system and chemical conditioning. The filter operating pressure and pump characteristics allow the installation of the skid and the compensation tank on deck below the Pool. Dosing station is complete with 2 dosing pumps of proper capacity in order to maintain free chlorine and pH values (only pH-) in filtered water within limit required by USPH.Dosage rate is proportional to chlorine content and pH value, and is automatically adjusted according to analyser reading. 4-20 mA signals proportional to Chlorine and pH measured values are available for remote log in ECR (by others). In order to optimize the space in pool machinery the two chemical tanks will be supply loose for shipyard installation.