--- product_id: 181285259 title: "25-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser" brand: "robelle" price: "€ 190.96" currency: EUR in_stock: true reviews_count: 9 category: "Robelle" url: https://www.desertcart.hr/products/181285259-25-pounds-premium-pool-calcium-up-calcium-hardness-increaser store_origin: HR region: Croatia --- # Rapid hardness boost Precise ppm control Prevents corrosion & etching 25-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser **Brand:** robelle **Price:** € 190.96 **Availability:** ✅ In Stock ## Summary > 💧 Keep your pool flawless and FOMO-free with Robelle’s calcium boost! ## Quick Answers - **What is this?** 25-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser by robelle - **How much does it cost?** € 190.96 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/181285259-25-pounds-premium-pool-calcium-up-calcium-hardness-increaser) ## Best For - robelle enthusiasts ## Why This Product - Trusted robelle brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Cost-Effective Pool Care:** Premium quality at a fraction of pool store prices—save without compromise 💰 - • **Easy Application Process:** Dissolves quickly and disperses evenly with your pool’s circulation system 💧 - • **Instant Calcium Power-Up:** Rapidly elevates pool hardness to ideal 200-400 ppm range ⚡ - • **Precision Dosing Formula:** 8 oz raises hardness by 10 ppm per 5,000 gallons for exact control 📏 - • **Protect Your Pool’s Integrity:** Prevents costly corrosion and surface etching 🛡️ ## Overview Robelle 25-Pounds Premium Pool Calcium Up is a granular calcium chloride formula designed to rapidly increase and maintain optimal calcium hardness levels (200-400 ppm) in pools. It protects pool surfaces from corrosion and etching, ensuring longevity and crystal-clear water. Each 8-ounce dose raises hardness by 10 ppm per 5,000 gallons, allowing precise adjustments. Trusted by thousands with a 4.6-star rating, it offers professional-grade quality at a budget-friendly price. ## Description This is a dry granular product that increases the total hardness in pool water to the recommended range.Test for calcium hardness with a reliable test kit. The desired range for calcium hardness is as follows: Vinyl Pools: 200-300 ppm, Tile and Exposed Aggregate Pools: 200-400 ppm, Marcite, Fiberglass or Painted Pools: 250-400 ppm. If the calcium hardness tests less than the desired range, add this product according to the included chart. Place this product into a plastic bucket already filled with swimming pool water. Do this in a ration of up to 2 pounds of product per approximate 5-gallon bucket of water. Slowly pour this solution around the perimeter of the swimming pool while the circulating system is operating. In a 10,000 gallon pool, do not add more than 10 pounds of this product per 2 hour period. Review: Good quality - Good quality - much cheaper than local pool supply Review: Cheaper than pool store, worth it. - Cost effective, much cheaper than from the pool store, and got our water to where it needed to be! ## Features - Calcium chloride for pools - Rapidly increases total hardness - Helps prevent corrosion or etching of pools - Ideal calcium hardness range 200 - 400 ppm - 8 ounces raises calcium hardness level 10 ppm per 5,000 gallons of water - Prevents the staining or etching of your pool's surface - Low calcium hardness level can cause water issues ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07B81QNWS | | Best Sellers Rank | #5,583 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #23 in Swimming Pool Balancers | | Brand Name | Robelle | | Customer Reviews | 4.6 4.6 out of 5 stars (540) | | Global Trade Identification Number | 00034261282592 | | Included Components | Pool Calcium Increaser | | Item Form | Granular | | Item Type Name | for Pools | | Item Weight | 25 Pounds | | Manufacturer | Robelle | | Product Benefits | Calcium Increaser | | UPC | 034261282592 | | Unit Count | 400.0 Ounce | ## Product Details - **Brand:** Robelle - **Item Form:** Granular - **Item Weight:** 25 Pounds - **Product Benefits:** Calcium Increaser - **UPC:** 034261282592 ## Images ![25-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser - Image 1](https://m.media-amazon.com/images/I/51grRTcWHfL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good quality *by A***R on December 20, 2025* Good quality - much cheaper than local pool supply ### ⭐⭐⭐⭐⭐ Cheaper than pool store, worth it. *by D***O on December 4, 2025* Cost effective, much cheaper than from the pool store, and got our water to where it needed to be! ### ⭐⭐⭐⭐⭐ Pool necessity at good value and shipped quickly *by A***R on December 5, 2025* This is a basic commodity item required for most pools. Not much product difference between brands and suppliers. This quantity from this supplier is handy and a good value. ## Frequently Bought Together - Robelle 25-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser - Pool Mate 7-Pounds Premium Pool Stabilizer and Conditioner, Concentrated Cyanuric Acid for Pools, Helps Chlorine Last Longer - Natural Chemistry Phosfree, 3-Liter --- ## 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.hr/products/181285259-25-pounds-premium-pool-calcium-up-calcium-hardness-increaser](https://www.desertcart.hr/products/181285259-25-pounds-premium-pool-calcium-up-calcium-hardness-increaser) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-23*