as said, it all depends on teh type of loach you are interested in, and whether or not it is an appropriate size for your tank. i've owned two species of loach. i had some kuhlis, which i never saw. they like to burrow and hide. mine so much so that i never knew they had all died, because i just never saw them again. others have had much better luck with their though, that was just my personal experience. however, i do currently own three botia striata, and i adore them. if the lfs ever gets more in, i'm buying 3 more. they are so active, playful, and not too shy. they hang out with my cories and will even keep my plec company. and boy are they good at helping the cories keep the bottom free of leftover foods. and i have a thing for fish with stripes, so thats another plus in my book. botia striata have neat coloration in my opinion, so i just enjoy looking at them.