You really need reactor and use iron oxide as that will never lease the PO4 unlike the aluminum oxide medias will . And if you use the Alum Oxide media the Sea Chems Phosgard is the best i ever used or heard of. All the Iron medias are about the same and several to choose from. _________ Some of the world's greatest feats were accomplished by people not smart enough to know they were impossible (Doug Larson) |