I would love to see a Kuhli Loach in the aquarium, mine hid all the time too but at night they were very active and would chase eachother through the tank. Like IXNAY said: they are just cool.
Woke up one day and found that one of my Kuhli's 'pulled a Nemo' : it took a trip through the filter. Unfortunately the poor animal never made it in one piece
I don't have a fishtank anymore and am really looking forward to the freshwater aquarium. Would be great if it would have some of the fishes I used to have