I think Wrassefan gave you the best advice. I would add an additional step: buy a 30 to 40 gallon brute gray garbage can, add freshly made sw with RO/DI. After you thoroughly scrub the LR, let it cook in garbage can for about 8 weeks. You should put a couple of powerheads in there as well so that you have a lot of flow. You'll want to do a water change about midway through. I know this sounds like a lot of work but it isn't. I did this once after a catastrophe and couldn't be more happy with the results.