In providing proper clown loach care, or any fish care for that matter, it is always best to try to create an aquatic environment that mimics the natural environment that the fish come from. Some people call this "biotyping". Personally, I think it's a very good idea. After all, when you go to a zoo, the monkey's have trees to climb on and the polar bears have cold water to swim in (having snow and ice would probably be better, but impractical for most of the year).
The things you put into the clown fish tank to make it a nice place for fish to live must be considered in clown loach care. The aquarium length is more important than the depth since the clowns only frequent the bottom strata of the tank. Clown loaches can be shy so give them places to hide (plants, caves, drift wood, etc). They peacefully coexist with other docile species, but if an aggressive fish is in the tank the clowns may spend most of their time in hiding.
Clown loach fishes thrive in normal pH and KH levels and they are very sensitive to extreme swings in water quality, temperature, ph, Kh, etc. When changing the water it is best to make frequent small changes at least once every second week, more often if possible. Clean, well-filtered water is essential for healthy fishes. Proper clown loach care is very similar to caring for any other aquarium fish.
When transporting a clown fish watch out for the suboccular spine. Many-a keeper has been stabbed by the spine while trying to remove the clown fish from their tanks. The spine can also be caught on a net and cause severe injury to the fish. Once out of the tank make sure that you use a solid container or a bag that you have double or triple bagged. The spines can rupture most normal plastic bags which leads to water loss and possible death of the fish.