Blue Devil B7455C Solutions No.1 Through No.5 Chlorine Level Indicator for Pool<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Replacement test solutions for 5-way OTO test kits</li><li>Refill solutions used for testing total chlorine/bromine; pH; alkalinity and acid demand</li><li>Replacement bottles are labeled to match 5-way test kit instructions</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41nyRXsPopL.jpg" noproxy>