After reading this, and being a pet store employee myself... Thank you, thank you, thank you! for doing your own research and having the fish's best interest at heart. I'm so glad you already have plans for them.... I cant tell you how many people don't know and don't care that they are not caring for their fish properly!
That being said.... I love clown loaches. They have such interesting little personalities! If I had a larger tank, I'd get some too. I'm thinking I may have to get a group when I finally get a real monster tank...