---
product_id: 624534853
title: "Crystal Cal Premium Activated Carbon, 25Lb Bulk Box, Reef Aquarium Grade, Calgon Carbon"
brand: "kolar labs"
price: "399851 Ft"
currency: HUF
in_stock: true
reviews_count: 5
category: "Kolar Labs"
url: https://www.desertcart.hu/products/624534853-crystal-cal-premium-activated-carbon-25lb-bulk-box-reef-aquarium
store_origin: HU
region: Hungary
---

# Fast-acting clarity Universal filter fit Lab-grade purity Crystal Cal Premium Activated Carbon, 25Lb Bulk Box, Reef Aquarium Grade, Calgon Carbon

**Brand:** kolar labs
**Price:** 399851 Ft
**Availability:** ✅ In Stock

## Summary

> 💎 Crystal-clear reefs start here — don’t let your tank miss out!

## Quick Answers

- **What is this?** Crystal Cal Premium Activated Carbon, 25Lb Bulk Box, Reef Aquarium Grade, Calgon Carbon by kolar labs
- **How much does it cost?** 399851 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/624534853-crystal-cal-premium-activated-carbon-25lb-bulk-box-reef-aquarium)

## 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

- • **Effortless Maintenance:** Simple dosing guide with easy rinsing keeps your aquarium pristine every 2-4 weeks
- • **Optimized Pore Structure:** Engineered for superior removal of tannins and heavy molecules for crystal-clear reefs
- • **Premium FCC-Certified Quality:** Food Chemicals Codex standards ensure ultra-pure, contaminant-free filtration 🧪
- • **Seamless Filter Compatibility:** Large granules flow effortlessly in reactors, canisters, and all filter types 🔄
- • **Overnight Water Transformation:** Eliminates cloudiness, odors & discoloration by morning ⚡

## Overview

KOLAR LABS Crystal Cal Premium Activated Carbon is a 25lb bulk box of reef aquarium-grade, laboratory-certified activated carbon from Calgon Carbon. Designed with an optimized pore structure and large granules, it rapidly removes colors, odors, and contaminants overnight while fitting all filter types. Produced to rigorous Food Chemicals Codex standards, it guarantees high purity and minimal dust, making it the trusted choice for professional and hobbyist aquarists seeking pristine water quality.

## Description

Fast-Acting & EffectiveCrystal Cal Activated Carbon was painstakingly sourced by our partners at Calgon Carbon and is made specifically for aquarium water filtration. It features a sub-bituminous coal base with optimum pore structure to help remove colors, tannins, odors, medications and other common contaminants from aquariums and ponds.Crystal Cal’s unique fabrication process results in an activated carbon that combines the best of lignite and coal-based carbons for superior removal and mechanical stability. Crystal Cal has a large pore structure, similar to that of lignite carbons, for effective removal of higher molar weight color inducing molecules from aquariums. This effective pore structure is combined with dramatically improved mechanical stability of coal-based granules to resist physical breakdown and dust production results in an ideal product for aquarium use.Most of the carbon sold for fish tanks is made to treat air, resulting in high levels of contaminants, such as phosphates, which may leach into water. All of our activated carbon is produced to rigorous food and drinking water standards for unparalleled consistency and quality that minimizes harmful trace contaminants. We are proud to say that Crystal Cal has low levels of extractables and dust and is washed and steam activated to higher standards of “Liquid Phase Carbon.”Get to Know Kolar LabsKolar Labs has been the source for premium filter medias in the aquarium industry for years. We provide top of the line filtration medias and components made by leading manufacturers for hobbyists as well as large public aquariums.We are the Sole Distributor for Lanxess Bayoxide E33 GFO, Lewatit DI Resins, as well as other premium filtration supplies. We stand behind all our products and, as a result, have gained the trust of many large aquarium companies.

Review: Not tio much dust. Size is great and it works great. Would order again.
Review: Great Product

## Features

- CONTAINS 15 lbs (6.8 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 | B06WD8RQ5F |
| Brand | Kolar Labs |
| Item Form | गरनयल |
| Item Weight | 340 g |
| Item model number | CC 5 Gal |
| Liquid Volume | 5 Gallons |
| Manufacturer | CALGON CARBON |
| Net Quantity | 6800.0 Grams |
| Package Dimensions | 36.98 x 31.75 x 30.63 cm; 340.19 g |
| UPC | 851794007269 |

## Product Details

- **Brand:** Kolar Labs
- **Item Form:** गरनयल
- **Item Weight:** 0.75 Pounds
- **Liquid Volume:** 5 Gallons
- **Manufacturer:** CALGON CARBON

## Images

![Crystal Cal Premium Activated Carbon, 25Lb Bulk Box, Reef Aquarium Grade, Calgon Carbon - Image 1](https://m.media-amazon.com/images/I/71U2MLbClRL.jpg)

## 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

### ⭐⭐⭐⭐⭐ Review
*by A***R on 16 January 2025*

Not tio much dust. Size is great and it works great. Would order again.

### ⭐⭐⭐⭐⭐ Review
*by L***S on 17 August 2025*

Great Product

### ⭐⭐⭐ Review
*by S***A on 11 December 2018*

Lowered rating from 5 to 3 stars only because of big increase in the price since my last purchase and found much less expensive AC elsewhere. Purchased 5 pounds in June 2018 for total delivered price of $79.92. Checked today to see about reordering 5 pounds and the price is now $20.00 higher. This product did arrive in a box and not a tub. I used it several times having to very thoroughly wash it in the media bag each time. Lots of fine particles and dust in the product. Because of the large price increase and fact that this product needs a lot of washing before being used, I'm going to search for a more competitive price with another supplier and hopefully it will also contain less fines. Update: Just placed an order on eBay for 20 pounds of AC including two media bags for $32.54 delivered. Positive reviews on it and worth trying in my opinion. Happy this supplier jacked up the price now because I would have otherwise just reordered. Original review: Product worked great. Koi pond around 500 gallons and couldn't clear up brownish colored water from tannins. Nothing was working including 10-15% water changes. Read about using a few pounds of this in a media (mesh) bag to clear up the water. Added around 5 lbs and WASHED the media bag with the garden hose until no black was coming out of it. Then placed the media bag in my skimmer while temporarily removing the filter and later just moved it to where the pond water would run through it before going over one of the waterfalls. Could see the bottom of the pond and koi clearly by next morning. If using medicine to treat koi, be aware that activated carbon reportedly removes it from your pond.

## Frequently Bought Together

- Kolar Labs Crystal Cal Activated Carbon – 5 Gallon, Activated Charcoal for Aquariums and Fish Tanks
- DEPEPE 10pcs 7.8 x 5.9 Inch Aquarium Filter Media Bags with Zipper for Activated Carbon, Biospheres, Ceramic Rings

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-03-03*