Looks like it is a system that adds copper ions to the pool ... so we would certainly recommend removing it to avoid potential metal staining or green hair.
If you maintain proper FC levels, then there is no need for the added copper.
Certainly turn it off. Probably does not matter too much if you pull it out of the plumbing or not. If you do not want the copper in contact with the water at all, then remove it.
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!