Ok well if you get "uncured" LR
that will cycle a tank in itself. You can take the shrimp out and cycle with the LR
. Go ahead and get all your LR
in the tank providing you have no live animals and let your tank cycle.
Often a cycling process can be very interesting and a lot of fun with LR
. Most people do not wait long enough to actually see some of the life.
Take your time and test your levels. Depending on how cured the rock is, and how much die off your cycle could be as short as 7 days or as long as a month.
Cycling is not going to hurt the rock. You do not want to cycle and then add rock to the mix you are better doing it all at once.