Jeffrey Bodony wrote:I use a pool type sand filter for my pond based irrigation system and much fine sediment and microbiology get's through.Those filters are for cleaning "big" stuff out of swimming pools.You could use it as a primary and pump into a slow sand filter/biochar bed and then into a holding tank for domestic use.There are membrane/cartridge filters for pool systems that will filter down to 25 microns or so.they're relatively expensive and tedious to clean but would provide potable water.It would be useful to do some water testing and find out exactly what you're trying to filter.