Update: I realized that Rosy Barbs are actually recommended for cooler water than the other fish prefer, so I've decided to replace them. Current stock plan:
1 Moonlight Gourami (possibly 7/8 Harlequin Rasboras instead)
9 Tiger Barbs
8 Glass Catfish (Asian Variety)
4 Botia Histrionica
OK, to reorganize my questions in a more coherent manner:
1. Will the moonlight gourami being twice the size of the tiger barbs daunt the barbs?
2. Will the tiger barbs ignore the catfish?
3. What other (ASIAN) centrepiece fish would you recommend instead of the moonlight? Do not say three spot gourami, they're not an option.
When you reply, please keep in mind that I do intend to have this tank fully planted and there will be caves for hiding places, so the gourami will have a place to hide if there is initially too much aggression.
Thank you!
