"no use don't use that either. Thats stuff (Cycle or any other brand) is used just to supposedly start off your fishless cyle at the outset"
It depends how you set up your tank. Some shops just give you 'Aquasafe' to use at the start which is what you should be using now and is also blue. I don't think aquasafe says dechlorinator distinctly on it, but it's the right stuff.
If you can't get any, leaving your water overnight will suffice for now, but I tend to leave overnight and add Aquasafe.