The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
The rock should fit in a 5 gallon bucket. Put enough sw mix in the bucket to cover the rock. Read this article on curing LR. The article was meant for a much larger quantity but still applies to your situation.
I agree about not adding any livestock to the tank. But, you want to think about treating her to a refractomer and some calibration fluid.