20-inch Big Blue Filters

 Arsenic Removal Filter Big Blue 4.5-inch x 20-inch style High arsenic removal capacity Minimal flow restriction Standard 4.5-inch x 20-inch filter size Big Blue filter with arsenic specific resin offers excellent removal of Arsenic with...

Nitrate/nitrite reduction filter Aries brand - made in the USA Standard 4.5-inch x 20-inch filters Aries AF-20-3610-BB Standard Big Blue filter fits standard 4.5-inch x 20-inch housings. Nitrate filter reduces nitrates and nitrites in the water,...