Is there any product on the market that either makes cycling a tank shorter than the usual 4-6 weeks or one that does it instantly?
better to do it naturally
why?
bio spira does work if kept cold. i would ask the lfs for a handful of gravel to help seed your tank.
Bio-Spira is the only product out there that I feel has the capabilities, but it isn't 100% reliable. Often, some part of its transport is not under optimum conditions.
Media transfer from reliable sources is the quickest way to get a bacteria colony under way and the tank up.