We closed our in-ground pool for the second time since having it built and the guy closing it this year suggested we soak our filter cartridges in cleaning solution in a trash can over the winter. Unlike the first company that closed our pool, this company completely removed the cartridges from the filter housing and we placed them in a heavy duty trash bag for storage. He suggested we get a large trash can to store the filters in and fill it full of water and "filter cleaning solution" to soak the filters over the winter months.
Does anyone have any comments on this approach and can anyone suggest the appropriate cleaning solution to soak them in?