this stuff may help the cycle, but i don't care if you use existing lr and sand and filters and everything, you are not going to completely skip hte cycle, it may speed up but not skip
lr and ls will help out much more IMO, and if you want to use existing products, often things like that can be gotten from local aquariists and or fish stores, for mcuh less (if anything at all) than orering especially mail order where you have to pay s and h too