I just remove the plant from the pot and rinse all the potting soil from the roots. The roots must be cleaned off to be exposed to the tank water. The roots are aerated with aquarium tubing attached to an air pump. The pump moves the water through the plant roots and the roots take in the dissolved ammonia, nitrites and nitrates from the fish waste, and faster than the good bacteria.
I use the HOBs for the period at night, when the land plants slow their filtering work. Then the good bacteria takes over when the tank and room lights go out.
The land plants only require ambient (room) light and a food source, the fish waste. The roots stay under the water, with the leaves above to take in light and CO2
from the air in the room.
A simple coop between fish and plants and I have a tank with a balanced water chemistry and very minimal water changes.