acidic wet product & nbsp; For cleaning and maintenance of sand filters, tile and pool walls of inorganic impurities, salts and rust.

• We open the filter box to have sufficient ventilation
• We add Ruinet to a 30-40% ratio of water left in the sand filter
• let the material act 3-12 hours depending on the amount of rocky material within the filter
• We do "Backwash" after we have first turned Polyvana in the corresponding option
• For best results rinse with ph+ plus solution