I was just wondering if there is a hardy low-light plant that I can put in my tank to help with the waste situation. I have a lot of rockwork in my tank and there are spots where fish waste accumulates that is impossible to siphon out. If I place a plant in these spots to help drain some of the nitrates from the waste before it leaches out into the water will that help the situation? Even if the effect is nominal every little bit helps. The substrate is sand.