AquaChek 561682 Monopersulfate Test Strips for Pool or Spa<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Easy to use and maintain your swimming pool or spa</li><li>Takes about 15-30 seconds to show results</li><li>A must for a swimming pool or spa owners!</li><li>Potassium Monopersulfate</li><li>pH</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51bvz2HFtPL.jpg" noproxy>