For multiple Dwarfs, the best aquascaping is to break the length into 3 sections so that each section is hidden/out of view of the other. When Dwarfs see each other, tension can build. But when rocks or decor break up the line of sight, they can get along fairly well, each taking a section and callin it their own. Three Dwards should have about a 6 foot length in a 125. or a larger dimensioned DT with more width (front to back).
Good luck!
Good luck!