---
product_id: 39918623
title: "Kolar Labs Crystal Cal Activated Carbon – Large Jar, Activated Charcoal for Aquariums and Fish Tanks"
brand: "kolar labs"
price: "₩47940"
currency: KRW
in_stock: true
reviews_count: 13
url: https://www.desertcart.kr/products/39918623-kolar-labs-crystal-cal-activated-carbon-large-jar-activated-charcoal
store_origin: KR
region: South Korea
---

# 0.7 lbs fast-acting carbon Fits all filter types Lab-grade granular purity Kolar Labs Crystal Cal Activated Carbon – Large Jar, Activated Charcoal for Aquariums and Fish Tanks

**Brand:** kolar labs
**Price:** ₩47940
**Availability:** ✅ In Stock

## Summary

> 💧 Crystal-clear aquariums, zero compromises.

## Quick Answers

- **What is this?** Kolar Labs Crystal Cal Activated Carbon – Large Jar, Activated Charcoal for Aquariums and Fish Tanks by kolar labs
- **How much does it cost?** ₩47940 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/39918623-kolar-labs-crystal-cal-activated-carbon-large-jar-activated-charcoal)

## Best For

- kolar labs enthusiasts

## Why This Product

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

## Key Features

- • **Overnight Clarity Boost:** Clears cloudy water, colors & odors by morning
- • **Optimized Pore Structure:** Specifically engineered to trap organic contaminants
- • **Simple & Efficient Usage:** Easy dosing with 1 cup per 50 gallons, changes every 2-4 weeks
- • **Premium Lab-Grade Quality:** FCC-certified activated carbon for pure filtration
- • **Universal Filter Compatibility:** Large granules flow seamlessly in any filter system

## Overview

Crystal Cal Activated Carbon delivers fast, reliable aquarium water purification with 0.7 lbs of FCC-certified, lab-grade granular carbon. Engineered for optimal pore structure, it removes odors, colors, and organic waste overnight while fitting all filter types for effortless, professional-grade filtration.

## Description

Crystal Cal Granular Activated Carbon is will clear up your cloudy aquarium water overnight. Made specifically for aquarium water filtration, our laboratory-grade activated carbon features a sub-bituminous coal base with optimum pore structure to remove colors, tannins, odors, medications and other common organic waste contaminants.
While most of the carbon sold for fish tanks is actually designed to treat air, Crystal Cal Granular Activated Carbon is washed and steam-activated to treat aquarium water, specifically. Unlike other common carbons or charcoals which can have high levels of contaminants that can leach into water, our carbon has low levels of dust and impurity extractables.

## Features

- CONTAINS 0.7 lbs (320 g) - FAST RESULTS: Works quickly to eliminate cloudy water, colors and odors overnight – guaranteed
- TRUSTED SOURCE: Made according to Food Chemicals Codex (FCC) standards; Bringing you the highest quality, bulk and packaged Activated Carbon
- HIGH PERFORMANCE: Laboratory grade granular activated carbon; Specifically made with optimum pore structure for aquarium use
- WORKS IN ALL FILTERS: Large granules allow great flow in any filter media bag, cartridge or filter for efficient filtration; Use in reactors, canister filters, intank filters or hanging filters
- EASY TO USE: Use 1 cup per 50 gallons (1 tablespoon for every 3 gallons); Change every 2-4 weeks; Short rinse before use

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Asin | B06W2PJ1ZJ |
| Best Sellers Rank | #398 in Aquarium Filter Accessories |
| Date First Available | February 20, 2017 |
| Item Model Number | CC 320g |
| Manufacturer | Calgon Carbon |
| Package Dimensions | 5.87 x 3.86 x 3.78 inches; 12 ounces |

## Product Details

- **Brand:** Kolar Labs
- **Item Form:** Granules
- **Item Weight:** 0.75 Pounds
- **Liquid Volume:** 50 Gallons
- **Manufacturer:** Calgon Carbon

## Images

![Kolar Labs Crystal Cal Activated Carbon – Large Jar, Activated Charcoal for Aquariums and Fish Tanks - Image 1](https://m.media-amazon.com/images/I/71oOR5N7mZL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is this the same type of charcoal used in the bags to remove odors around the home and in vehicles?**
A: Yes, this is a true liquid phase carbon made specifically for water purification, but it will work well for air handling as well, to remove odors around the home, litter box etc.  One thing you will notice is that it is very clean, low dust, which you will really like when handling it.  Thanks!

**Q: can this be used in cat litter boxes?**
A: This product will be perfectly safe and effective for use in cat litter boxes.  Thanks!

**Q: What is the carbon made of?  Coal, hardwood, or coconut husk?**
A: This is called a sub-bituminous Granular Activated Carbon.  It is a very clean, coal based carbon, that is derived from a special source, not in China, with an excellent pore structure for aquarium use.

**Q: Can I use this product for water filter system for my house?**
A: Sure, that is how I use it.  Just be sure to rinse out the fine particles before you install.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great value
*by  on Reviewed in the United States November 25, 2025*

Great value--lasted a couple of years for our 20-gallon tank. Did the job! With a name like Kolar--it's gotta be excellent! (My former surname). :}

### ⭐⭐⭐⭐⭐ Love Kolar Labs!
*by  on Reviewed in the United States May 20, 2026*

My husband is in the salt water hobby, and uses activated carbon for his tank. He was purchasing it from another company that was double the price for the same amount. When we saw that Kolar Labs sold it, he was so excited to try their product since he has been habit with their other products! It is working so far, the size of the carbon is exactly what we were needing, and it has lasted quite a bit now in his system. Definitely will purchase again!

### ⭐⭐⭐⭐⭐ Good value
*by  on Reviewed in the United States May 15, 2026*

Good product used to filter water after medication is used then I replace with seachem purigen

## Frequently Bought Together

- Kolar Labs Crystal Cal Activated Carbon – Large Jar, Activated Charcoal for Aquariums and Fish Tanks
- DEPEPE 10pcs Aquarium Filter Media Bags with Zipper for Activated Carbon, Biospheres, Ceramic Rings
- Marineland White Diamond 50 Ounces, Removes Toxic Ammonia, Aquarium Filter Media

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**Shop now:** [https://www.desertcart.kr/products/39918623-kolar-labs-crystal-cal-activated-carbon-large-jar-activated-charcoal](https://www.desertcart.kr/products/39918623-kolar-labs-crystal-cal-activated-carbon-large-jar-activated-charcoal)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-08-29*