Pool Frog 01-18-4406 Instant Mineral Sanitizer for Inground Swimming 25k Gallons<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>New Instant Frog 01184406 Inground Swimming Pool Mineral Sanitizer (Up to 25，000 gallons)</li><li>Drops right into pool skimmer basket</li><li>Lowers pool's use of chlorine up to 50%</li><li>Helps prevents skin and eye irritation from chlorine</li><li>Should be replaced every 6 months</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31I9yGLUDwL.jpg" noproxy>