I have had a nitrate problem in my tank lately and went online and found out about pothos plants in a bob filter. It said that it can remove 5-10ppm of nitrate in a week, so I decided to give it a try.
Starting nitrate is about 35-40ppm
This is how it looks with the plants sticking out. If it works I will post how I did it. It only cost me 8 dollars because I already had the filter.