Yes. You can clean the prefilter elements several times before you have to replace them. It is important that you use only Sea Recovery prefilter elements, these are engineered with special materials and a specific micron rating.
String wound and fiber type filters are designed for the photographic industry and will last only 1/10th the time of the proper Sea Recovery filter element. Using string wound or fiber type filter elements will require ten times more maintenance and cost ten times more in element changes. Swimming pool filters and household under-the-sink filter elements are made from the wrong material; they are not of the proper micron rating and will fall apart in seawater which will cause fouling and damage to the reverse osmosis membrane elements.