{"product_id":"coral-seas-yellow-out-pool-shock-4-lb-algae-killer-chlorine-boost","title":"Coral Seas Yellow Out Pool Shock - 4 lb Algae-Killer \u0026 Chlorine Boost","description":"\u003ch2\u003eCrystal Clear Water Starts with Yellow Out\u003c\/h2\u003e\n\u003cp\u003eCoral Seas Yellow Out is a powerful pool shock designed to tackle all common algae strains—green, brown, pink, and mustard—within roughly 24 hours. It dissolves instantly with no brushing required, helping restore the pool’s natural clarity without leaving harsh residues on the surface. After you add Yellow Out, an oxidizer activates the formula, giving you the flexibility to choose chlorine, bleach, or a non-chlorine shock as your next step.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits in One Dose\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMulti-purpose chemistry: helps raise chlorine levels, and can influence water hardness and pH for balanced water.\u003c\/li\u003e\n  \u003cli\u003eStrong performance: a high chlorine content delivers a quick boost when water chemistry needs attention.\u003c\/li\u003e\n  \u003cli\u003eFast-dissolving, no brushing needed: simply add to the pool and it starts working promptly.\u003c\/li\u003e\n  \u003cli\u003eEffective algae control: targets several algae strains to improve water appearance and feel.\u003c\/li\u003e\n  \u003cli\u003eNight-friendly application: many pool owners treat pools at night to reduce sunlight effects and maximize impact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to Use for Best Results\u003c\/h3\u003e\n\u003cp\u003eTo activate Yellow Out, add the product to the pool and then introduce your preferred oxidizer after a short wait. Do not premix Yellow Out with chlorine or any other chemicals. The rule of thumb is 2 lb treats per 15,000 gallons, and this product supports treatment across different pool surfaces and systems, including salt generators.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMix before you fix: dissolve the powder in a bucket of water before pouring into the pool.\u003c\/li\u003e\n  \u003cli\u003e2 lbs treats 15,000 gallons of pool water.\u003c\/li\u003e\n  \u003cli\u003eNever premix Yellow Out with chlorine or other chemicals.\u003c\/li\u003e\n  \u003cli\u003eFollow with chlorine, bleach, or a non-chlorine oxidizer to activate the formula.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSurface Compatibility and Safety\u003c\/h3\u003e\n\u003cp\u003eYellow Out is designed to be safe for plaster, fiberglass, vinyl pools, and pools with salt generators. Always follow the label directions and handle with care to protect pool finishes and equipment. While it supports clearer water, results can vary with current conditions and usage patterns.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose Yellow Out?\u003c\/h3\u003e\n\u003cp\u003eFor pool owners seeking a straightforward, chemical-smart approach to algae challenges, Yellow Out offers a practical option that combines rapid action with flexible oxidizer choices. It’s crafted to fit into everyday pool maintenance routines without requiring aggressive scrubbing or complicated mixing, while still delivering the potential for noticeably clearer water over a short period.\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: Is Yellow Out safe for all pool surfaces and systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it’s designed to be safe on plaster, fiberglass, vinyl pools, and salt generator systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the correct mixing and application sequence for Yellow Out?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Never premix with chlorine or other chemicals; add to water, wait 5 minutes, then add chlorine or a non-chlorine oxidizer.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Coral Seas","offers":[{"title":"Default Title","offer_id":48212948418804,"sku":"B002WKF9SO","price":42.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/6652\/0820\/files\/coral-seas-yellow-out-bottle-pour_184f48ba-92aa-4d3e-a2b8-6ebb256c21a1.jpg?v=1778452457","url":"https:\/\/www.cerapatiogarden.com\/products\/coral-seas-yellow-out-pool-shock-4-lb-algae-killer-chlorine-boost","provider":"Cera Garden","version":"1.0","type":"link"}