I tried out the CLEAR2O® RV AND MARINE INLINE WATER FILTER - CRV2006 and was suppried when I found grayish water in my toilet. Checking my water filter it was coated with charcoal, threw it away and took off the Clear20RV filter flushed my system and finally got back to clear water. Just wonder if anyone else had an issue with this filter? Contacted the company and they were no help, offered to send them the filter and never heard from them again.