Poomwah, have you been able to implement the bioactive/planted viv for your Taiwanese? I'm very curious how you'll go about it!
I have a small subadult female currently in a planted viv--though I'm horrible about keeping up on the substrate (full screen top + desert climate do not help). I found the bioactive/planted vivarium method to be very successful with her when she was younger.. First in a 12x12x18" Exo terra, later in a 30x14x24" glass viv. Haven't quite found the 'happy place' for her current 42x18x18" viv, though I haven't had a lot of time to really work on it.
I'm finally going to sit down and dial in her viv this month... And it looks like I'll be getting the opportunity to try a planted viv for my juvenile Vietnamese blue beauty, as well!!