Pool Time maxblue 3 in. Tablets are a multi-functional 6-in-1 chlorinating tablet that kills algae and bacteria for a clean swim ready pool. They also soften the pool water and protect the pool from staining and the equipment from scale formation. The built-in stabilizer protects chlorine from sunlight burn-off so the chlorine lasts longer.Algae killerKills bacteriaSoftens water6-in-1 formulaPrevents corrosion and scaleBuilt-in sunlight protectorCan be used in a skimmer, floater or feeder Can be used in a skimmer, floater or feeder Algae killer, Kills bacteria, Softens water 6-in-1 formula Prevents corrosion and scale Built-in sunlight protector