With a regiment of regular membrane cleaning, membrane life, Permeate production and optimal salt rejection can be achieved. Membrane cleaning procedure should be performed as part of your sites SOP (standard operating procedure) for the HyperLogic systems. Other indicators include RO exhibiting lower Permeate flow, strong odor or mold groth on the membrane scroll end. Please refer to your RO's Operational Manual or included Instructions for use and handling care details. Single use 4.5" x 20" Cartridge. Formerly HyperLogic HL 11917