From the limited available information regarding getting Khuli loaches to breed in home aquariums it does happen but rarely and most times it was not planned. That said from the information I have when they do spawn its high in the tank usually around floating weeds and the eggs are a luminous green. Possibly the best bet to breed them would be to have them in thier own tank with nothing else to predate on the eggs or interrupt their spawning attempts. Plant wise I would go for water cabbage, water hyacinth (if its available in your area...its illigal to have in Queensland) or water sprite or duck weed even salvina (another illigal plant in Queensland). I say these types of plants so that the khuli loaches have the roots of these plants to lay their eggs in, that being said I belive they may also put some eggs on the glass, again up near the surface of the water.
