BThe Ultimate "Sink-Float" Pool Chlorine Tab Dispenser - The Sunken Treasure - Floater & Sinker - 3 inch Tab - Color: Light Blue (Made in the USA) ReviewbP PP The Ultimate "Sink-Float" Pool Chlorine Tab Dispenser - The Sunken Treasure - Floater & Sinker - 3 inch Tab - Color: Light Blue (Made in the USA) PSimple Design Sinking Pool Chlorinator - Sinks when filled, Floats when emptyPDispenses chlorine from the bottom of the pool where it is needed to sanitize your pool water.PUse up to 75 less chlorine than with a normal floater chlorinatorP1 tab in a Sunken Treasure is equal to about 3-5 tabs in a floaterPSee below for proper use of this Made in the USA, patented, anti-air pollution award winning chlorine dispenser.