I'm looking for a tall sturdy plant for my 24 inch deep mid sized south american cichlid tank... over time, I'd like each tank to be truly as regional as possible... I have an Anubias Congensis, in my African tank, that is growing really well, that tank is also 24 inches deep, and the tallest leaves are brushing the surface... looking at South American plants that would grow similarly to the Congensis... I found on line the Grandfolius... I'm not adding fertilizer for the Anubias... just wondering if I could grow the Grandfolia similarly???