Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
Mangroves are more brackish water plants, and sure would not be my first choice for Discus.
Go with assorted house plants, and make sure they have enough light. I have the best luck with Golden Pothos, but have also grown heart leaf Philodendron, and the really fancy Maranta with purple and silver banding on the leaves. I have a lot more plants in pots at the edge of my indoor pond. Just started this, but the sweet potato (from the grocery store) is taking over the small tank it was in, so I have moved it to the pond. I started that in a glass with some toothpicks stuck into it. It was OK, but not great until I moved it to an aquarium with better light. Still stuck out of the water about half way, but WOW the roots and leaves exploded.