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SpaGuard Balance Pak 300 (750G) Calcium Hardness Increaser (SKU 7534) : Amazon.ca: Patio, Lawn & Garden
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Balance Pak 300 - essential component needed in all swimming pools to properly balance the water. - YouTube
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Amazon.com : BioGuard Balance Pak 300-12 Lb 52220BIO : Swimming Pool Ph Balancers : Patio, Lawn & Garden
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