Great! After installing my SWG and finally getting the water balanced (salt, cya, ph, etc.), I am reading about these pitfalls. My DE filter has a SS case. I certainly don't want that getting corroded! In addition, I have read about some environmental issues to the point that some jurisdictions don't allow saltwater pools. I am invested now and it is too late. I hope I don't regret this decision. Now, I think I should have stayed with the old fashion way or added a liquidator instead.