I have one in my tank that is doing really well after a few months.
I purchased a relatively small plant, took it out of the pot, shook the dirt off it and rinsed it off in a bucket thoroughly and left overnight to soak.
I then went to a shop and purchased a shower caddy with suction caps and put the plant in there with the roots just in the water and stuck it to the glass. The roots can grow out of the gaps in the caddy and the plant grows up and over the side of the tank.
My plants are not submerged, just the roots. I also have 2 peace lily plants growing the same way and they are thriving.