{"product_id":"mav-aquadoc-spa-ph-decreaser-sodium-bisulfate-64-oz-for-hot-tubs-fast-ph-correction","title":"MAV AquaDoc Spa pH Decreaser Sodium Bisulfate - 64 oz for Hot Tubs, Fast pH Correction","description":"\u003cp\u003e\u003cstrong\u003eMAV AquaDoc Spa pH Decreaser is a sodium bisulfate pH down formulated to safely lower high pH levels in hot tubs and spas for clearer, more comfortable water.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eHigh pH in spa water can cause cloudy water, scaling on heaters and surfaces, and less effective sanitizers. MAV AquaDoc’s 64 oz pH Decreaser provides a measured, reliable way to bring spa water back into the recommended range so your equipment lasts longer and your soak stays pleasant. This product is made in the USA and is designed specifically for hot tubs and spas where frequent small adjustments are often needed.\u003c\/p\u003e\n\n\u003ch3\u003eHow quickly will this product lower my spa’s pH?\u003c\/h3\u003e\n\n\u003cp\u003eYou’ll see pH changes after the product dissolves and the water circulates—typically within 15–30 minutes of mixing and running the pump. Adjustments depend on water volume, current pH, and alkalinity; always add in small doses and retest between treatments.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eAdd in measured amounts per manufacturer directions and circulate for at least 15 minutes.\u003c\/li\u003e\n  \u003cli\u003eRetest pH and alkalinity after each small dose to avoid overshooting the target range.\u003c\/li\u003e\n  \u003cli\u003eUse water test strips or a digital tester for accurate readings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow much should I use to correct high pH in a 250–500 gallon hot tub?\u003c\/h3\u003e\n\n\u003cp\u003eDosing depends on the starting pH and total alkalinity; start with small amounts and recheck. For most residential hot tubs, several ounces will produce a noticeable drop in pH, but conservative, incremental dosing prevents overcorrection and keeps water balanced.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eBegin with a small portion of the 64 oz bottle—follow label dosing for your tub volume.\u003c\/li\u003e\n  \u003cli\u003eWait 15–30 minutes with the pump running before retesting pH.\u003c\/li\u003e\n  \u003cli\u003eRepeat small additions until pH falls to the 7.2–7.8 range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill lowering pH affect my sanitizer or equipment?\u003c\/h3\u003e\n\n\u003cp\u003eYes—bringing pH into the recommended window helps sanitizers work more effectively and reduces scale formation on heaters and jets. Proper pH protects your hot tub’s components and keeps water comfortable for bathers without damaging seals or metallic parts.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eBalanced pH improves chlorine and bromine efficiency.\u003c\/li\u003e\n  \u003cli\u003eLower pH within range reduces mineral scaling on heater elements and surfaces.\u003c\/li\u003e\n  \u003cli\u003eConsistent pH adjustments extend the life of pumps, filters, and seals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I handle and store this sodium bisulfate product safely?\u003c\/h3\u003e\n\n\u003cp\u003eHandle with care: avoid skin or eye contact and keep away from children and pets. Store the sealed 64 oz container in a cool, dry place away from other chemicals and moisture to maintain product stability and performance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWear gloves and eye protection when measuring and adding to water.\u003c\/li\u003e\n  \u003cli\u003eKeep the lid tightly closed and store out of direct sunlight.\u003c\/li\u003e\n  \u003cli\u003eDo not mix with other chemicals—add to water only after dilution guidance on the label.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: MAV AquaDoc Spa pH Decreaser is intended for hot tub and spa owners, maintenance professionals, and anyone responsible for regular spa care who needs a dependable, concentrated pH-lowering product. It’s most useful for those who test water regularly and prefer incremental control when correcting high pH to protect equipment, improve sanitizer performance, and restore clear, comfortable water. If you maintain multiple spas or manage a residential hot tub, the 64 oz size provides enough volume for repeated adjustments without constant repurchasing.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this pH decreaser in my saltwater hot tub?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. MAV AquaDoc sodium bisulfate can be used in saltwater hot tubs; add gradually and retest pH after circulation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I test spa pH when using this product?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Test pH before each treatment and again 15–30 minutes after adding the product until pH is stable in the 7.2–7.8 range.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"MAV AquaDoc","offers":[{"title":"Default Title","offer_id":54207778619576,"sku":"B0FH7KL64B","price":113.01,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0636\/7416\/files\/mav-aquadoc-spa-ph-decreaser-front-label.jpg?v=1790657054","url":"https:\/\/canadianlawn.ca\/products\/mav-aquadoc-spa-ph-decreaser-sodium-bisulfate-64-oz-for-hot-tubs-fast-ph-correction","provider":"Canadian Lawn","version":"1.0","type":"link"}