I have Aglaonema, Pothos, Philodendron and Nephthytis. I make a large, retangular pocket of plastic netting attached to long bamboo sticks. The netting is secured by plastic twist ties. Simple to lay the frame across the top of the tank and emerse the plant root ball into the tank water. The leaves are held above the water by the netting. There's no substrate needed.
All the potting mixture must be rinsed off the roots before putting the roots into the tank water or the plant will die. The roots take in the nutrients from the fish waste and balance the water chemistry.
I keep the standard HOB
filters to filter the tank water at night when the plants slow their filtration work. The filters keep the water moving through the plant roots, so there's a constant source of nourishment for the plants. The leaves grow with the long hours of low light and CO2
from the air circulating in the room.
The great thing about the plants, they require only ambient "room light". I have some pole lamps I leave on 12 hours a day and the plants are thriving. I may have some pics I can post if you're interested.