--- product_id: 85751916 title: "BioGuard Back Up 2 Algae Preventative, 1 Quart, Single Pack | Proven Effective Algae Preventative, Non-Staining, Keeps Water Clean and Clear" brand: "bioguard" price: "$85.56" currency: USD in_stock: true category: "Bio Guard" url: https://www.desertcart.us/products/85751916-bioguard-back-up-2-algae-preventative-1-quart-single-pack store_origin: US region: United States of America --- # Powerful wetting agent Sunlight-stable formula Boosts activity as water heats BioGuard Back Up 2 Algae Preventative, 1 Quart, Single Pack | Proven Effective Algae Preventative, Non-Staining, Keeps Water Clean and Clear **Brand:** bioguard **Price:** $85.56 **Availability:** ✅ In Stock ## Summary > 🌊 Stay ahead of algae—because clear pools are the new status symbol. ## Quick Answers - **What is this?** BioGuard Back Up 2 Algae Preventative, 1 Quart, Single Pack | Proven Effective Algae Preventative, Non-Staining, Keeps Water Clean and Clear by bioguard - **How much does it cost?** $85.56 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/85751916-bioguard-back-up-2-algae-preventative-1-quart-single-pack) ## Best For - bioguard enthusiasts ## Why This Product - Trusted bioguard brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Deep Penetration Power:** Surfactant formula targets algae in hidden cracks and crevices. - • **Non-Staining & pH Neutral:** Maintains crystal-clear water without altering pH or leaving marks. - • **Sunlight-Stable Protection:** Keeps your pool algae-free even under the brightest sun. - • **Seamless BioGuard Integration:** Works perfectly with BioGuard’s 3-Step Care System for effortless pool maintenance. - • **Temperature-Activated Defense:** More effective as water temperature rises—peak protection when you need it most. ## Overview BioGuard Back Up 2 is a top-rated, non-staining algae preventative liquid that remains stable in sunlight and increases effectiveness as water warms. Its powerful wetting agent penetrates hard-to-reach areas to stop algae before it starts, all while maintaining your pool’s pH balance. Designed for easy use and compatibility with BioGuard’s 3-Step Care System, it’s the trusted choice for professional-grade pool clarity. ## Description BioGuard Back Up Algaecide is BioGuard's most effective algae preventative. The highly effective formula prevents wide variety of algae growth. It's stable in sunlight and will not evaporate. The activity of this product increases as water temperature rises, which is when you need protection the most. Back Up has a powerful surfactant/wetting agent, which makes it able to work in the tiny cracks and crevices where algae starts. This product will not affect pH levels and is non-staining. ## Features - Highly Effective Algae Preventative: Our non-staining highly effective formula prevents a wide variety of algae growth. Weekly use of Back Up 2 prevents before it starts. It's stable in sunlight and will not evaporate. The activity of this product increases as water temperature rises, which is when you need protection the most. - Powerful Wetting Agent: Our Back Up 2 has a powerful surfactant agent, which makes it able to work in the tiny cracks and crevices where algae starts. It does not affect pH levels. - Add this product directly to the pool by pouring around the outside perimeter of the pool while filter and pump are in operation. This product is not recommended for use in pools that feature attached spas or intricate water features. - Compatible with the 3-Step BioGuard Care System: This product seamlessly integrates with either the 3-Step or Once-A-Week 3-Step BioGuard Care System, offering flexibility and convenience for pool owners. The addition of algicide is needed for proper pool maintenance. - Tested and Proven Effective: BioGuard products are known for delivering reliable results and making pool care easy. BioGuard carries an extensive line of pool solutions for all needs. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01N1FBFZL | | Best Sellers Rank | #11,184 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #30 in Swimming Pool Algaecides | | Brand Name | BioGuard | | Customer Reviews | 4.7 4.7 out of 5 stars (550) | | Item Form | Liquid | | Item Type Name | Pool & Spa Supplies | | Item Weight | 2 pounds | | Manufacturer | BioGuard | | Manufacturer Part Number | BIO23050 | | Model Number | BIO23050 | | Number of Items | 1 | | Product Benefits | Controls Algae | | UPC | 017541000581 017541262668 017541652469 | | Unit Count | 32 Fluid Ounces | ## Product Details - **Brand:** BioGuard - **Item Form:** Liquid - **Item Weight:** 2 pounds - **Product Benefits:** Controls Algae - **UPC:** 017541000581 017541262668 017541652469 ## Images ![BioGuard Back Up 2 Algae Preventative, 1 Quart, Single Pack | Proven Effective Algae Preventative, Non-Staining, Keeps Water Clean and Clear - Image 1](https://m.media-amazon.com/images/I/61i4Krrm3FL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - BioGuard Back Up 2-1 Quart, Single, Proven Effective Algae Preventative, Non-Staining, Keeps Water Clean and Clear - BioGuard Pool Complete Weekly 3L, 3-in-1 High-Intensity Clarifier & Cleaner, Prevents Waterline Buildup, Removes Phosphates, Keeps Water Clear --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/85751916-bioguard-back-up-2-algae-preventative-1-quart-single-pack](https://www.desertcart.us/products/85751916-bioguard-back-up-2-algae-preventative-1-quart-single-pack) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-27*