Ok so I have ordered an 81L (20US gallon ) saltwater aquarium (my first ever saltwater aquarium) and want to use add Tim’s to instantly cycle it but after having three freshwater tanks in the past I know cycling tanks can take a while and I am a bit reluctant to trust that I can fill up my tank wait for ammonia reading , Dr Tim’s on sand only and then add fish right away has anyone had experience with it does it really work ? And is the one in the picture the right stuff ?