Replacement OTO Chlorine Test and Phenol Red Solutions in 1/2 Ounce Bottle (#8450)

Swimline swimming pool water test kit refills for Hydrotools Model 8410 and 8420 test kits with OTO and Phenol Red solutions in 1/2 ounce bottles The Model 8450 Replacement Test Kit Solutions in 1/2 Ounce Bottles Features Include One (1) each 1/2 ounce bottle of Phenol Red pH level test solution One (1) each 1/2 ounce bottle of OTO Chlorine/Bromide level test solution Replacement solutions for Model 8410 and 8420 Hydrotools Test Kits