Hello Rob
Glad you received the order with my pick and hope you enjoy aqua-scaping.
There are couple ways to cure the rock with minimal to no issues with inhabitants of your system.
The rock has some decay and will take roughly 2 to 3 weeks in cycling for ammonia readout to 0.And it goes as fast as 7 to 10 days if live rock or tank water is added to the cycling stage.
I will tonight have a full post on cycling
fijireefrock.com