Give me a call and I'll go with you.If I had another lifetime I'd move to Bormeo and study these down to the genetics!
For now I'm trying to save some money for a short Borneo trip in the near future.
About the algae growth on the rocks; I really don't know what's the trick.
In both tanks I try to do a waterchange of 25- 30% twice a week(sometimes 40 % once a week) and sometimes add some micro-element fertilizer.
Hillstreamtank 1 has some decent algae growth, in hillstreamtank 2 it seems to be more difficult.