Hello Cindy and Welcome to Fish Lore. According to your aquarium information you have just started your tank and you are unaware of the
nitrogen cycle. (see link below)
The Aquarium Nitrogen Cycle <--crucial to fish keeping.
The Nitrogen Cycle is the break down of
ammonia, nitrites and nitrates that is from fish waste and fish food. To find out where your cycle stands you should have a
test kit,
API (liquid) Master Test Kit is most recommended. It contains everything you need to test for ammonia, nitrites and nitrates and
pH levels.
I recommend doing a 30 to 50%
water change and adding a product called "Prime" or "Amquel +" to detox the ammonia that is in your tank now (more than likely). Your fish are probably suffering from ammonia poisoning since your tank isn't cycled. The Prime or Amquel + will detox the ammoina for the 24 hour period until it is time for your next water change. You need to continue with the water changes until you have test readings of 0 ammonia, 0 nitrites and 5-20 nitrates.
I know this is a lot of information coming to you all at once but it's necessary to keep your fish alive. Too, I'm giving you a link about Clown Loaches.
Clown Loach Coloration & Marking Variations — Loaches Online
Best of luck.
Ken