---
product_id: 105912394
title: "Crystal Cal Activated Carbon – 3.5 Gallon, Activated Charcoal for Aquariums and Fish Tanks"
brand: "kolar labs"
price: "€ 298.12"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.sk/products/105912394-crystal-cal-activated-carbon-3-5-gallon-activated-charcoal-aquariums
store_origin: SK
region: Slovakia
---

# 50 gallons capacity Lab-grade quality 10.5 lbs weight Crystal Cal Activated Carbon – 3.5 Gallon, Activated Charcoal for Aquariums and Fish Tanks

**Brand:** kolar labs
**Price:** € 298.12
**Availability:** ✅ In Stock

## Summary

> 🌊 Dive into Clarity with Kolar Labs!

## Quick Answers

- **What is this?** Crystal Cal Activated Carbon – 3.5 Gallon, Activated Charcoal for Aquariums and Fish Tanks by kolar labs
- **How much does it cost?** € 298.12 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/105912394-crystal-cal-activated-carbon-3-5-gallon-activated-charcoal-aquariums)

## 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

- • **Trusted Quality:** Made to Food Chemicals Codex (FCC) standards for peace of mind.
- • **Crystal Clear Waters:** Eliminates cloudy water, colors, and odors overnight!
- • **Versatile Compatibility:** Works seamlessly in all filter types for maximum efficiency.
- • **User-Friendly Application:** Simple usage instructions for hassle-free maintenance.
- • **High Performance Filtration:** Optimum pore structure for superior aquarium filtration.

## Overview

Kolar Labs Crystal Cal Activated Carbon is a premium 3.5-gallon activated charcoal solution designed for aquariums and fish tanks. Weighing 10.5 lbs, this lab-grade granular carbon effectively eliminates cloudy water, colors, and odors overnight, ensuring a pristine aquatic environment. Compatible with all filter types, it’s easy to use and maintain, making it a trusted choice for fish enthusiasts.

## Description

Full description not available

## Features

- CONTAINS 10.5 lbs (4.75 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 |
|---------------|-------|
| Item Weight | 4.75 Kilograms |
| Liquid Volume | 50 Gallons |
| Target Species | Fish |
| Item Form | Liquid, Granules |

## Product Details

- **Brand:** Kolar Labs
- **Liquid Volume:** 50 Gallons
- **Item Weight:** 4.75 Kilograms
- **Item Form:** Granules, Liquid
- **Manufacturer:** Calgon Carbon

## Images

![Crystal Cal Activated Carbon – 3.5 Gallon, Activated Charcoal for Aquariums and Fish Tanks - Image 1](https://m.media-amazon.com/images/I/41f3nmgc4ML.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

### ⭐⭐⭐⭐⭐ A must for clean water
*by M***X on May 15, 2025*

This is great value filtering media .it works perfect at removing foul smell from aquarium and water is crystal clear. Clean water - healthy fish

### ⭐⭐⭐⭐⭐ Perfect
*by E***. on December 19, 2024*

works well in clearing your aquarium water

### ⭐⭐⭐⭐⭐ awesome
*by G***K on December 20, 2024*

great product

## Frequently Bought Together

- Kolar Labs Crystal Cal Activated Carbon – 3.5 Gallon, Activated Charcoal for Aquariums and Fish Tanks
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**Shop now:** [https://www.desertcart.sk/products/105912394-crystal-cal-activated-carbon-3-5-gallon-activated-charcoal-aquariums](https://www.desertcart.sk/products/105912394-crystal-cal-activated-carbon-3-5-gallon-activated-charcoal-aquariums)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-07*