It's Bob Scum Sponge

 Other Items from Spa Cleaners

  Fast Gloss from Lesiure Time - 
  Citra Brite from Leisure Time - 
  Fix A Leak - Pint - 
  Fix A Leak - Quart - 
  Scum Balls 2 Pack - 
  Zorbo - 
  Spa Cleaning Pad - 
  Tub Rub from Leisure Time - 
  Blaster Automatic Filter Cleaner - Blaster filter cleaner will work on almost ANY size filter cartridge
  Filter Cleaner Wand - 
  It's Bob Scum Sponge -