Find a nice friend or local reefstore that's willing to part with some "aged water" or saltwater from their tank. The water's chemistry is different than freshly mixed saltwater and is less caustic and will make the cycle shorter. If you clean the live sand then you will lose most if not all of the beneficial bacteria, so, you may want to add some biozyme, cycle, or biospira. If you have alot of dead stuff on the rocks you should manually remove that as well as it will only make an ammonia spike.