Thanks for the suggestion but unless it dose not show up when you search Sulfur they don't have any. I think I found some From marine depot they had it listed under the reactor name and only call it media replacement. I might just have to try and use some seachem denitrate in the reactor unless someone one has some better suggestions to get rid of nitrates without water changes FYI i don't want plants too much work and I already have a small remote deep sand bed only about 10x4x5.