---
product_id: 45002185
title: "Kolar Labs Crystal Cal Activated Carbon – 1 Gallon, Activated Charcoal for Aquariums and Fish Tanks"
brand: "kolar labs"
price: "S$98"
currency: SGD
in_stock: true
reviews_count: 13
url: https://www.desertcart.sg/products/45002185-kolar-labs-crystal-cal-activated-carbon-1-gallon-activated-charcoal
store_origin: SG
region: Singapore
---

# Fast-acting clarity overnight Universal filter compatibility Lab-grade, FCC certified purity Kolar Labs Crystal Cal Activated Carbon – 1 Gallon, Activated Charcoal for Aquariums and Fish Tanks

**Brand:** kolar labs
**Price:** S$98
**Availability:** ✅ In Stock

## Summary

> 💧 Transform your aquarium water overnight—because your fish deserve the best!

## Quick Answers

- **What is this?** Kolar Labs Crystal Cal Activated Carbon – 1 Gallon, Activated Charcoal for Aquariums and Fish Tanks by kolar labs
- **How much does it cost?** S$98 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/45002185-kolar-labs-crystal-cal-activated-carbon-1-gallon-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

- • **Crystal Clear Overnight:** Eliminates cloudiness, odors & discoloration by morning
- • **Optimized Pore Structure:** Engineered for maximum adsorption of organic waste and toxins
- • **Simple & Efficient Usage:** Just 1 cup per 50 gallons with easy rinse and bi-weekly replacement for peak performance
- • **Premium Lab-Grade Quality:** FCC standard activated carbon ensures safe, contaminant-free filtration
- • **Seamless Filter Integration:** Large granules flow effortlessly in any filter type—canister, reactor, or cartridge

## Overview

Crystal Cal Activated Carbon is a 3 lb, laboratory-grade granular activated charcoal designed specifically for aquarium water filtration. Certified to Food Chemicals Codex standards, it rapidly removes cloudiness, odors, tannins, and organic contaminants overnight. Its optimized pore structure and large granules ensure efficient filtration across all filter types, making it the trusted choice for maintaining crystal-clear, healthy aquatic environments.

## 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 3 lbs (1.3 kg) - 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 | B06W9NJJ1D |
| Best Sellers Rank | #398 in Aquarium Filter Accessories |
| Date First Available | February 19, 2017 |
| Department | All Ages |
| Item Model Number | CC 1 Gal |
| Manufacturer | Calgon Carbon |
| Package Dimensions | 10.12 x 5.79 x 5.79 inches; 2.87 pounds |

## Product Details

- **Brand:** Kolar Labs
- **Item Form:** Granules, Liquid
- **Item Weight:** 1.3 Kilograms
- **Liquid Volume:** 1 Gallons
- **Manufacturer:** Calgon Carbon

## Images

![Kolar Labs Crystal Cal Activated Carbon – 1 Gallon, Activated Charcoal for Aquariums and Fish Tanks - Image 1](https://m.media-amazon.com/images/I/71gg24mOqfL.jpg)

## Available Options

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

## 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 – 1 Gallon, Activated Charcoal for Aquariums and Fish Tanks
- Kolar Labs GFO Bayoxide E33 Phosphate Remover – for Freshwater and Saltwater Aquariums, Reef Tanks, Promotes Coral Health (454g)
- Geiserailie 15 Pieces Aquarium Filter Media Bags 150 Micrometer Fine Filter Bags Mesh Reusable with Zipper for Activated Carbon Resins(5.5 x 7.9 Inch,Nylon)

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**Shop now:** [https://www.desertcart.sg/products/45002185-kolar-labs-crystal-cal-activated-carbon-1-gallon-activated-charcoal](https://www.desertcart.sg/products/45002185-kolar-labs-crystal-cal-activated-carbon-1-gallon-activated-charcoal)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-08-27*