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Solution for testing Chlorine with OTO - Large size for multiple refills
- This replaces the OTO solution on all test kits that are using oto
- This is the solution that is in all 4 or 5 way test kits
- For 2 way use 1/2 oz or buy this and refill twice
- This is 8 ounces so it is 8 times more then normal. Share with your neighbors and save money.
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