AFAIK, If you're looking for something that removes a lot of nutrients, you'll want to look for plants that grow quickly. Most of the plants that come to mind are stems like Hygro. polysperma, Rotala rotundifolia, Elodia/Egeria densa (pondweed), etc. Water sprite is great, it can be used as a floating plant and sucks up nutrients like a sponge.
If your fish are producing more NO3/PO4 than the plants are using, water changes are probably the easiest way to remove it, unless your tap water is high in NO3/PO4. If that's the case, I'd grab some fast growing stems or floating plants, that should help take care of it.