"How do I get my clown loach to become more active, they hide too much for my liking."
This is an extremely common question for hobbyists who have clown loach, and I've been through the frustration myself.
There are a few things you can do to improve your chances of having extremely active fish, though none of them are a guarantee that your clowns won't go and chill for a while out of the way.
First and foremost the size of your pack is an obvious starting point. They are extremely sociable fish and will feel way more comfortable if you have a few of them. Six or so is the minimal number we usually see quoted. It's a reasonable starting figure, but a nice rounder figure would be ten, or more.
They do seem to prefer subdued lighting too, and hand in hand with your lighting would go substrate colour. Bright lights with white sand is probably not a great way to get your clowns out and about all the time.
Hidey holes. Clown loach just love to cram themselves into the tightest of nooks and crannies in bog wood and rocks, and larger specimens love PVC pipes. Do you take these refuges away to completely reduce the chances of your clowns hiding? Never. Part of making your clowns feel more comfortable in the tank is to have these very hiding places. Seems counter intuitive but if you have a good sized pack with the correct lighting then they should feel less inclined to hide anyway.
But like I said, there are no guarantees with clowns. I have eleven. My lighting is quite low and it is a black barebottom tank except for rocks and driftwood, no substrate at all. My pack are very active 80% of the time, but I suppose all this activity just whacks them out because for the other 20% of the time they"ll go and sleep in their dens!
I think I have a good balance with mine which I'm happy with, and that balance between being active and hiding is what clown loach keepers aspire to.