2) AquaChek 552244 6-in-1 Spa Hot Tub Pool Easy Use Test Strips Kit | 100 Strips<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Easy to use and maintain your hot tub 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/51tuhbhMpnL.jpg" noproxy>