Blue Devil B7212C OTO and Phenol Red Solutions<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Test pool's chlorine level and pH indicator</li><li>05 oz. plastic bottles</li><li>Reagent refill for Blue Devil Test Kits</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51g4V5z8hIL.jpg" noproxy>