I have a bit of a horror story about khuli loach. I had two in a 1.5ft tank, with 2 large pearl gouramis, flying fox, and a few other fish. Anyway I needed to strip down the tank as I was moving out of my parents house, so I sold off all the fish but I could only find one loach! The flat I was moving into was delayed, so after I had got rid of the fish I drained the tank and left it in my room. It was there for about a month. When it finally came to moving out I took the tank out into the garden to get the gravel out and rinse it. As I scooped out the gravel (Im sure you've seen this coming by now) I noticed the missing khuli loach, it had been hiding under the gravel! I was nearly sick. The poor thing had been living in literally no water, with no filtration, for what must have been more than a month!