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
- 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
- Hydrotools part # 8450