I thought a few have tried using certain plants such as pothos and water sprite in their tanks to reduce nitrate. Does this work? Do some plants actually use significant amounts of nitrate/ammonia, enough to make their incorporation into the tank or its filter worthwhile? My (heavily) overstocked 20L growout's ammonia levels never show, but nitrates are a big problem. I've been doing 50%-90% water changes daily, and nitrate still tests at 40-50ppm or more the next day. The nitrate levels of the water added during the changes have been 0 the two times that I've tested. I've added some anubias, java fern, anacharis, dwarf hairgrass, and even a handful of widgeongrass thus far; but I thought I remembered a few CCA members talking about using pothos at one point or another.