Dan, Sorry, I missed your last sentence. So teh tank is now devoid of all livestock?
If so I have some additional advice to help you get to a succesful tank.
1. Place all of your rock in a plastic bind and cover it with water from the tank.
Get rid of the crushed coral substrate and replace it with aragonite sand. You want an inch or two of sand.
Get some base rock
(50 pounds or more).
Place the rock directly on the bottom and then add the sand.
Add some water then add your LR
on top of the base rock
Crushed coral traps detritus (uneaten food, fish poop, etc.)
2. Do a 50% water change with freshly mixed salt. Mix the salt as you normally do, maknig sure to let it aerate with a power head overnight at a minimum, with 24 hours being ideal. You can get a BRUTE trashcan at Lowes for this. All BRUTE by Rubbermaid are food grade safe.
3. Cycle the tank using the fishless method. This should not take very long as you are startting with LR
4. TEST TEST TEST the water parameters.
5. DO NOT ADD ANYTHNG YOU DO NOT TEST FOR FIRST! ever!
The above will get you on the road to a successful marine tank.
You have come to the right (best) site for advice. Heed it. Read the articles, ask questions, especially before you buy something. Most folks here have made the mistakes and are here to to help you avoid making them. So the posts I like most are from people doing their research here before buying anything and then following their journey to a wonderful world of enjoyment from their little piece of the ocean at home.