Test Kit Refills 2 pk

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$3.99
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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