I have a IM 25 lagoon that was setup in 2021. I got as far as adding dr Tim’s to start the cycle, test the water a couple days and then life got in the way. No fish or coral was added and not sure the tank completely cycled. Water stayed in the tank probably 60 to 90 days before everything was broken down and moved to the attic. Here we are three years later and ready to start over. My question is, can I use the same rock from before, or do I need to buy new dry rock? If the answer is new rock, what would be the disadvantage of just buying live rock this time over dry rock. Thanks for the help.