NOT what you want to hear but............... I believe most of the hybrids brought in, especially those from Malaysia have about a 25% success rate when that small. A good friend just brought in a few different types all very small, and 15 out of 18 fish didnt live 2 weeks. Most wouldnt eat and simply starved. I think Necros trick of Melafix is about as good a chance of any that you can give them. Unfortunately it just seems to be the nature of these juvi hybrid's. If you can grow them out to about 5-6" they seem to be very hardy. I am currently keeping a tsn x niger and although he is doing very well, I cringe every time I look in the tank.
JMO.....of course.
bob