I am filling up my 90 gallon tank with RO water and salt mix.I am going to buy LR from a friend mine.My question is, can I put the LR in my new aquarium or will It kill the LR.I'm a little confused.If you bought cured LR rock from the LFS you could just come home and put It into your new tank.because my water is new will It kill the LR?I' am going to spend two hundred dollars and I don't want to screw myself by killing the LR.Any answer would be greatly appreciated thanks..