I just happen to read about these angels in one of the aquajournal issues. It mentions that if you get the just imported wild caught fish, you must provide them acidic water (pH 4.5 - 5) and then raise over a period of time for them to adopt. Also they are very sensitive to ich, but can tolerant temp. up to 31C, so it shouldn't be a problem. It also mentioned that the tank's swimming space must be at least 45cm in height and with penty of space filled with low and soft plants, such as hairgrass. Feeding must not be overdone, otherwise, they will grow with fatter body but much shorter fins.
Hope this helps. Good luck finding them.
Eheim pimp club #48
800L 100% Flourite
80L plant/shrimps nursery tank inconnected with the main tank
Total 600W HQI, 2 X 5200K 2 X 6500K
Eheim 2028 X 2 2080 X 1
Dupla Substrate Heater
Dupla S external reactor
Aquamedic 2hp & Teco R15 400W chillers
Sega pH Controller
Light period: 6 hours on each bulb across 12 hours
Water Parameters: pH 6.4, KH 2, GH 1, NO3 40, PO4 1 TDS 250