I have just finished 4 of my 10 zones of a ditch/creek water sprinkler system. I am pumping the water out of the creek, through an inline filter (supposedly, by proplumber bought at lowes). It has not even been running a week and I am about to clean out the sprinkler heads for the second time. Can someone reccommend a product to help me filter the creek water? I am pulling an 1 1/2 inch pvc line out of the creek which is running high now but has been very dry sometimes as well. I am going nuts. Thanks.