Hi,
I want to put LR in my FO tank for filtration purposes only. However, do I need to buy cured rock, or can I get away from not having cured rock? I am not planning on having coral or anything of the sort either. Thanks for the help in advance.
That depends... is your tank already established with fish in it?
If your tank already has fish in it, then you either need to buy cured rock or you need to buy uncured and cure it yourself in a rubbermaid container.
If this is a new tank, then you can just buy uncured rock and use it to cycle your tank.
HTH