Interesting that there is not much information on the web regarding bananna plants. I have had mine for only a month and am playing it by ear myself.
I do'nt think it matters if the plant is in the topsoil or simply floating around. It seems to derive it's nutrients from the water collumn rather that the substrate. I keep mine partially buried in the gravel, but mainly for cosmetic reasons although it does have a modest root underneath.
Mine is doing well with modest lighting and no root tabs, just fish poop and occasional doses of Flourish Excell.
I do'nt think it matters if the plant is in the topsoil or simply floating around. It seems to derive it's nutrients from the water collumn rather that the substrate. I keep mine partially buried in the gravel, but mainly for cosmetic reasons although it does have a modest root underneath.
Mine is doing well with modest lighting and no root tabs, just fish poop and occasional doses of Flourish Excell.