Quote Originally Posted by Animalnstinct View Post
I'm a huge fan of the pipa pipa as well and I'm currently in the process of gathering everything I need to house a few.

As for filtration I'm going to be using a under gravel filter, but you could always use a sponge filter or something else. For my setup I have a 90 gallon tank with the under gravel filter, smooth gravel on that, then river rocks on that. I read that using live plants was a waste as the pipa pipa would just rip everything up so I bought a few fake plants and am currently looking for something to float on the top of the water such as possibly Mongolia leaves.
Looks like you did your homework Plant material that falls in the water will rot creating a "blackwater" biotope, like one of the tributaries of the Amazon, known as the Rio Negro. Check out this website for more info on "blackwater":
South American Blackwater Biotope Aquarium Setup