No worries! lol
And yes, the dead prawn in the tank can generate enough ammonia to get you cycled. Theres a great article and poster on here, Eco, thats the best I've seen as far as a guide to cycling.
Usually pure ammonia can be gotten here at a hardware store, we have ace hardware. It cant have any perfumes or additives.
I personally used the pure ammonia cause you can get a precise ammonia level and keep dosing the tank to 4ppm without any guesswork as with the raw shrimp method its kinda dependant on the decay level of the shrimp. make sure to put the shrimp in a nylon baggie or the foot of a pantyhose (new one) so that when you go to remove it that it doesnt muck up your tank.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.