Are any specific plant better at absorbing nitrates than others?

[Hholly]

So it turns out I do have nitrates in my tap water at about 20ppm. So despite frequent 50% pwcs my nitrates are always high. I have a fish with dropsy, and I think my Betta is getting fin rot. I have some live plants but they don't seem to be making any difference. I just bought some root tabs to help the plants. But I was wondering if certain plants would help? Any suggestions would be appreciated. Thanks!

[mfdrookie516]

All plants consume N. The faster they grow, the faster they use it. Fast growing plants like hornwort, wisteria, water sprite... even duckweed.