I have lived in my home for 18 years and always had a Big Blue whole house filtration system. I use a string wound filter first, followed by a sediment filter. Yesterday my water pressure dropped to nothing if I was running more then one appliance that required water . For example, I flushed the toilet and turned on the shower and had a small stream of water coming from the shower head. After the toilet tank refilled the shower head had normal pressure. It also took my washing machine forever to fill. I put in fresh filters the first of September 1 and purchased filters that I thought would last for 6 months: Culligan RFC-BB 10" Big Blue Water Filter RFC-BBS and Aqua-Pure AP814 Rust, Dirt, Sediment Water Filters. I have not used filters in the past that lasted more then two months. Today, I went into my crawl space to check my filters since my water pressure is still so low. The string wound filter looked fine. The second filter ( Micron Rating: 25 Micron, Dimensions: 9 3/4" x 4 1/2", Carbon, Filter Life: 10,000 gallons or 6 months per filter, Culligan Filtration Level 4 - Premium Filtration) had mud in the canister and on the bottom of the filer. I have never had this problem. Have I used a filter that is too strong? Any advice would be helpful.