Hello Danny,

Thank you for your inquiry.  I would first need to know if you are looking at setting up a reef tank or a fish only system.  From there we can plan out the best course of action for you.  I would recommend either calling us directly (1-800-566-FISH) or emailing us customercare@marinedepot.com as it will be easier to discuss back and forth with you what to do.  I have also linked a couple of articles below that I think might help some:

Restoring a neglected tank parts 1 and 2:

http://kb.marinedepot.com/article.aspx?id=10165&cNode=4O3V2M

http://kb.marinedepot.com/article.aspx?id=10166&cNode=4O3V2M

If there is anything else we can do for you please let us know.

Keith M.

Marine Depot Customer Service