Spa Choice 472-3-4011 Spa Chemical to Increase pH Level， 1-Quart<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Raises the pH level in your spa or hot tub</li><li>Spa Choice Increase pH is compatible with all sanitizers including bromine， chlorine and biguanide</li><li>The water in your spa should be maintained at a pH of 7.2-7.8 ppm (parts per million)</li><li>Downloadable User Guide Available Under Product Information: Technical Specifications</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41Tb%2Bh0kquL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51H6ZCJS0DL.jpg" noproxy>