Yeah, you could keep MTS for a whole hour in that tank! lol You'll have some very happy clown loaches if you go that route.
I can't think of anything else off-hand that would keep the sand stirred.
The clown loaches might get a bit of free play time out of the MTS, and may even encourage them to dig around in the sand for them. Given a decent starting number (say 25ish) I doubt they'd be able to decimate them all before they reproduced. If I'm not mistaken, most loaches have a hard time eating MTS due to the trap door they have, yes? Are clown loaches able to suck them out of their shells anyway? (hey, since MTS are basically free with most live plant purchases from the LFS, why not give it a shot? Even if they don't eat algae, they will keep the sand moving for you.)