| | Re: Syngonium to help polish water...
Its been pounded into our heads what an aquarium must be...with gadgets everywhere and cords and powerstrips buzzing away that we forget that sunlight is good and plants can filter the water Carbon for smells? Not if you have thick masses of plant roots. IMMERSED plants the best. It's why cities use cattails and marsh plants,and not submerged plants or not so much.
A really advanced aquarist would consider it normal to use houseplants in separate basins..with the big Aquarium's water fed into that and then returned to the tank. Done in a nice esthetic way rather than how it's done in greenhouse setups with ugly basins and white PVC pipe everywhere.
It can be done to look nice..nature does it.