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Walmart [walmart.com] has the HTH 6-Way Swimming Pool Test Kit (model # 1273) on sale for $ 9.23. Shipping is free with Walmart+ (free 90-day trial here [walmart.com]) or on $ 35+ orders.
HTH 6-Way Swimming Pool Test Kit (Chlorine, Bromine, pH, Alkalinity, Hardness, Cyanuric Acid) $9.25 + Free S&H w/ Walmart+ or $35+