Clown loaches like a varied diet - I feed mine on frozen bloodworm or tubifex worm about two or three times a week, and some sort of greenery like cucumber, courgette or peas (with the shell off) two or three times a week, giving them a few days a week off to make sure they don't overeat. If you can feed them live food like live bloodworm or brine shrimp they will love you forever!
Not sure about the other fellas, but
http
/www.loaches.com is the best online guide to loaches that I have found - enjoy!