You can try getting nassarius snail to help flip your sand. It's commonly seen on ah beng.
As for your rock, turbo snail will be a good choice but you may also look into Astraea Turbo Snail as they all smaller in size if you think the regular turbo snail is too big.
Try to mix a number of different cleaning crew to yield the best possible result. Just go google and search for reef tank cleaning crew you should be able to get a rough idea on the options available for you.