Pleatco PMAX50P4 - 2x Filter Pack - Filter For Maax SpasPleatco PMAX50P4 2x Filter Pack Hot tubs and spas offer year round enjoyment, but to ensure they remain safe and clean, proper maintenance is crucial. Filters play a key role in keeping the water clean and maintaining its chemistry. Constructed with pleated material, these filters trap debris and tiny particles, ensuring a sanitary experience. It's recommended to clean cartridge filters every 1 2 months and replace them every 4 6 months, especially