12) Aquachek 511710 Pro Swimming Pool Spa 5 in 1 Test Kit Strips 5-Way 100 pack<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>Free Chlorine</li><li>Total Chlorine</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41HDYB4pgiL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41GvnCbhW2L.jpg" noproxy>