mmm interesting. Those two plants look really nice! Im only nervous because a lot of the shops put them in the same tank as other fish.
I do have a localish aquarium that I have had some luck with in Greenwich, CT for fish purchasing and they gave me some good advice with my goldfish tank when I went away on vacay. As long as the tube plants have no history of disease with them I could try it. The disease issue was my main concern.

I will try to get a picture of the red belly when he stands up. It is really just a little pink and I dont see anything on his legs or arms. It is literally just like a little faint pink rash on the lowest part of his belly that would touch the sand. I also added some smooth large rocks to the tank in hopes that it might help him move around a little smoother.