---
product_id: 68431621
title: "Clack A8011 Corosex Brownish White Aggressive pH Correction Media for Acidic Water, 0.66 CF Bag"
brand: "clack"
price: "R12269"
currency: ZAR
in_stock: true
reviews_count: 5
url: https://www.desertcart.co.za/products/68431621-clack-a8011-corosex-brownish-white-aggressive-ph-correction-media-acidic
store_origin: ZA
region: South Africa
---

# Clack A8011 Corosex Brownish White Aggressive pH Correction Media for Acidic Water, 0.66 CF Bag

**Brand:** clack
**Price:** R12269
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Clack A8011 Corosex Brownish White Aggressive pH Correction Media for Acidic Water, 0.66 CF Bag by clack
- **How much does it cost?** R12269 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/68431621-clack-a8011-corosex-brownish-white-aggressive-ph-correction-media-acidic)

## Best For

- clack enthusiasts

## Why This Product

- Trusted clack brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Clack Corosex - Aggressive pH correction from 4.0-6.0 pH rangeBy neutralizing the free carbon dioxide in water, Corosex can correct acidic water conditions and render it less corrosive. Corosex, being a highly reactive magnesium oxide, is used most effectively where pH correction is substantial or high flow conditions are in use. pH correction and media consumption are affected by a number of water chemical variables. Being soluble to acidity, Corosex will slowly dissolve and will need to be replenished periodically. On a per weight basis, magnesium oxide can neutralize five times more acidity than can calcium carbonate. This results in greatly reduced chemical usage for the same pH correction. Please note; under certain low flow conditions, Corosex may overcorrect and create a highly basic (high pH) condition. Under certain hardness conditions, pH correction can cause hardness minerals to precipitate out of solution, resulting in cementing or solidification of the Corosex mineral bed. Up flow service is generally recommended with hardness exceeding five grains per gallon. (Always use an in-line filter ahead of an up flow system to prevent plugging of the lower distribution screen.) As Corosex's magnesium oxide neutralizes the water, it will increase hardness and a softener may become necessary after the neutralizing filter. Corosex can be effectively combined with Clack Calcite to combine the high flow neutralization properties of Corosex, along with the slower reacting low flow properties of Calcite, reducing potentially high basic properties due to overcorrection.ADVANTAGES High degree of activity and speed of correction allowing high flow High capacity...less chemical usage PHYSICAL PROPERTIESCorosex Color: Brownish white Bulk Density: 75 lbs./cu. ft. Mesh Size: 6 x 16 Specific Gravity: 3.6 gm/cc Effective Size: 1.4 mm Uniformity Coefficient: 1.7 Composition: MgO 97% min.CONDITIONS FOR OPERATION Down flow service is generally satisfactory on waters wit

## Product Details

- **Brand:** Clack
- **Item Weight:** 50 Pounds
- **Item Form:** Granular
- **Product Benefits:** Effectively corrects acidic water conditions and reduces corrosion

## Images

![Clack A8011 Corosex Brownish White Aggressive pH Correction Media for Acidic Water, 0.66 CF Bag - Image 1](https://m.media-amazon.com/images/I/21Bbs-kaGJL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Happy with the purchase.
*by B***T on August 5, 2020*

The item was what I expected. It was well packaged. Attached are the images of the 50 pound bag that I received.

### ⭐⭐⭐⭐⭐ Shipped Promptly and was as advertised.
*by A***R on September 24, 2019*

Use sparingly. It works very well. You can over-soften your water very easily.

### ⭐⭐⭐⭐⭐ works
*by K***R on October 3, 2021*

Makes 80/20 mix

## Frequently Bought Together

- Clack (A8011) Corosex Aggressive pH Correction Media for Acidic Water 0.66 CF Bag
- Calcite (Calcium Carbonate) pH Filter Media 1/2 cu. ft
- Funnel for Resin & Mineral Tanks - 2.5-inch x 10-inch

---

## 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.co.za/products/68431621-clack-a8011-corosex-brownish-white-aggressive-ph-correction-media-acidic](https://www.desertcart.co.za/products/68431621-clack-a8011-corosex-brownish-white-aggressive-ph-correction-media-acidic)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-15*