If you're asking about cleaning your jacuzzi because the hard water leaves it kinda' yucky . . . try this. Fill your jacuzzi with the hottest water available. Ad 1 1/2 cups of dishwasher detergent and turn it on and let 'er rip! I usually go about my business and leave it on for 10 or 15 minutes. Drain and rinse well. Voila! A sparkling jacuzzi without elbow grease!