i have also attached plants with monofiliment fishing line,
and when I supected the plants might sink roots into driftwood , used string that would eventually just rot away once roots were set.
But as said above, many cichlids such as carpintus, and Vieja are omnivores, and eat, uproot, or just chew them up.
I also like to use mangrove trees, sometimes sold as propagules for salt water aguaria.
They work as fresh, brackish and salt water plants, and once established are almost indestructable.
I fill empty bamboo stems with sand and place the seed ods in them, with leaves above te water line.


They become real trees and get quite large, and require sufficient light.
I keep them in a sunlit area, in my outdoor sump to consume nitrate, along with water lilies, and other nutrient suckers.