Has anyone replaced their Hayward Turbo T-Cell-15 with a non Hayward brand? I am seeing a much cheaper model online shown in photo. I have had my pool for 10 years but have not yet changed the SWG cartridge. It is constantly blinking Check Cell since opening and I cleaned it this season before opening. This brand saves $500 from OEM Hayward and it is also “discounted” on this site. I have added 120 pounds of salt and no change in salt level along with check cell message so it is time to change.