Reconfigurable spa filter treatment systems and methods for treating filtered water for spas and hot tubs

A method for treating water in a spa or a hot tub, the method comprising:

• suspending a first water treatment dispenser from an upper end of a filter cartridge disposed in a skimmer of the spa or the hot tub, the filter cartridge having a filter medium defining a chamber, at least a portion of the first water treatment dispenser disposed in the chamber of the filter cartridge, and the first water treatment dispenser having a first water treatment material;
• suspending, from the first water treatment dispenser, a second water treatment dispenser in the chamber of the filter cartridge, the second water treatment dispenser having a second water treatment material different from the first water treatment material in the first water treatment dispenser;
• passing a supply of water from the spa or the hot tub into the skimmer and through the filter medium of the filter cartridge so that the first water treatment dispenser and the second water treatment dispenser are disposed in the filtered water in the chamber of the filter cartridge to dispense the first water treatment material from the first water treatment dispenser and to dispense the second water treatment material from the second water treatment dispenser during a period of time;
• and
• returning a supply of treated filtered water from the filter cartridge to the spa or the hot tub during the period of time.

A reconfigurable spa filter system receivable in a skimmer of a spa or a hot tub for use in treating water in the spa or the hot tub, said system comprising:

• a filter cartridge having an upper end, a bottom end, and a surrounding filter medium disposed between a periphery of said upper end and a periphery of said bottom end to define a chamber therein;
• said upper end having a dispenser suspending structure operable for suspending and for supporting a water treatment dispenser having a water treatment material in said chamber of said filter cartridge;
• and
• wherein when water from the spa or the hot tub is directed into the skimmer and through said filter medium of said filter cartridge, the water treatment dispenser disposed in the filtered water in said chamber of said filter cartridge is operable to dispense the water treatment material from the water treatment dispenser, which treated filtered water is discharged from said filter cartridge and into the spa or the hot tub during a first period of time.