so what kind of plants can I get to put in my sump in order to reduce nitrates in my tank ? something that requires no light or very very little ..... non toxic is best as well incase some falls or gets in the tank and releases something in the water just incase I have thought about pothos but I have read they have a sap on the leave or something and that worries as id rather not have to move the plant for maintaince and get sap either on my skin/hands, or inside the sump or something. I don't really have room for to be rooted and totally submerged in my sump, but I was thinking of a basket suctioned cup to the inside of sump so just the roots are submerged and etc. any help would be great thanks rob