I'll run thru the filter set-up. Started with ($60) long gold M50, has a plastic (3-media) insert, black metal (cotton-filled) came with Yong Heng and ($14) blue metal (cotton-filled) was left over from hand pumping days. Humid Florida garage caused black filter cotton to get soaked, added the ($125) copper-colored coalescing water filter, clean and dry since. Note high placement of items to be filled, make moisture work hard (uphill) to get to your stuff. WM