Inline CO2 Diffuser (19mm & 25mm) - Fluval FX

Name: Aqua Rocks Colorado Inline CO2 Diffuser (19mm & 25mm) - Fluval FX - Inline CO2 Diffuser (19mm & 25mm) - Fluval FX
Brand: Aqua Rocks Colorado
SKU: 45546347659512
Price: 39.99 USD
Availability: InStock
Rating: 5 (1 reviews)

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$39.99

Quantity

Color

Black

Quantity

Description

The Inline CO2 Diffuser (19mm & 25mm) is a professional-grade CO2 diffusion system designed specifically for large canister filters like the Fluval FX series. This inline diffuser provides superior CO2 dissolution directly into your filter's output line, ensuring maximum efficiency and even distribution throughout your planted aquariu...

Reviews

5.0

7 ratings

Excelente!

Raul · May 1, 2026

Delivery & Returns

Aqua Rocks Colorado

4.9 (376)

Product description loading

This is the product description text that will appear here.

Aqua Rocks Colorado

Silicone Tubing - Food Grade

(4)

$3.99

Aqua Rocks Colorado

Aquarium CO2 Reactor V4 by ARC

(6)

$129.99

Aqua Rocks Colorado

The 2HR Aquarist All-in-one APT Complete

(4)

$11.80

Aqua Rocks Colorado

Anubias barteri Coin Leaf - Pot

$12.99

Exclusive offer available

Buce Plant

Chihiros WRGB II PRO LED Light

(29)

$251.99

CO2Art inline aquarium atomizer diffuser system with 12-16mm hose and 13mm fittings for CO2 injection in aquariums.

Cuboid Aquatics LLC

CO2Art Inline CO2 Aquarium Atomizer Diffuser System

$49.99

CO2Art.us

4.6

(808)

Aqua Rocks Colorado

Alternanthera reineckii 'Mini' - TC

(1)

$14.99

7% off

Aqua Rocks Colorado

Neo In-tank CO2 Diffuser - Stainless Steel

$27.99$29.99

Aqua Rocks Colorado

WEEK AQUA M Series Version 3.0 - Latest Model 2025

(12)

$89.99

Exclusive offer available

Buce Plant

UNS Atmos Aquarium Light Background

(24)

$169.99

Nature Aquariums USA

STAINLESS STEEL CO2 DIFFUSSERS

$19.95

Aqua Rocks Colorado

Icelandic Lava Stone

(9)

$35.00

Aqua Rocks Colorado

Anubias barteri var Barteri - Tropica

$12.99

Aqua Rocks Colorado

Oase Biomaster 2 Thermo Canister Filters - Latest Model

(2)

$279.99

Aqua Rocks Colorado

Inline CO2 Diffuser Version 2

$29.99

30% off

Aqua Rocks Colorado

ARC Premium Dual Stage CO2 Regulator

$159.99$229.99

29% off

Aqua Rocks Colorado

Neo In-tank CO2 Diffuser - Acrylic

$4.99$6.99

Glass Aqua

4.7

(7K)

Ultum Nature Systems Controsoil - Glass Aqua

14% off

Aqua Rocks Colorado

Sunsun Inline Heater 300Watt

(1)

$42.99$49.99

AquaZen

CO2Art Inline CO2 Aquarium Atomizer Diffuser System

(1)

$37.00

Aqua Rocks Colorado

Ultra Pure Rimless Aquarium by ARC

(1)

$399.99

Aqua Rocks Colorado

Staurogyne repens - TC

(1)

$14.99

21% off

Aqua Rocks Colorado

Yugang Horizontal CO2 Reactor - Acrylic

(2)

$94.99$119.99

Aqua Rocks Colorado

Aquascape Algae Scaper

$17.99

50% off

Aqua Rocks Colorado

VIV Classic Lily Pipe

$19.99$39.99

Aqua Rocks Colorado

Wild Rihno Stone - Poland - Inert

$105.00

Aqua Rocks Colorado

Seiryu Stone - None Acid Wash

(5)

$35.00

The 2Hr Aquarist

4.8

(706)

APT Jazz The best root tabs plant fertilizer for planted tanks

UNS Pro Dual Stage CO2 Regulator for precise gas control, featuring pressure gauges and durable metal construction.

Exclusive offer available

Buce Plant

UNS Pro Dual Stage CO2 Regulator

(45)

$219.99

Aqua Forest Aquarium

4.9

(1.6K)

CO2Art.eu

CO2Art Inline CO2 Aquarium Atomizer Diffuser System

(46)

€47.99

Aqua Rocks Colorado

WEEK AQUA L Series Version 3.0 - Latest Model

(16)

$229.99

Aqua Rocks Colorado

Alternanthera reineckii 'Rosanervig' - Tropica

(1)

$12.99

Aqua Rocks Colorado

Hakkai Stone

(13)

$64.99

Zooxae

SR Aquaristik In-Line CO2 Diffuser

$39.98

Aqua Rocks Colorado

The 2HR Aquarist All-in-one APT Zero

$23.90

Aqua Rocks Colorado

Cryptocoryne wendtii 'Tropica' - Tropica

$12.99

Aqua Rocks Colorado

Double Tap Quick Disconnect Connector

(2)

$9.99

Exclusive offer available

Buce Plant

Chihiros Heater Pro

(16)

$106.99

Aquarium Co-Op

4.9

(7.1K)

Easy Green All - in - One Fertilizer - Aquarium Co - Op

Easy Shrimp and Snail Shells - Aquarium Co - Op

Aqua Rocks Colorado

Black Spider Driftwood - PreSoaked

(14)

$6.99

Aqua Rocks Colorado

Bacopa caroliniana - Tropica

$12.99

60% off

Aqua Rocks Colorado

Spiderwood Driftwood

(12)

$15.99$39.99

Exclusive offer available

Buce Plant

UNS Drop Checker

(73)

$13.99

8% off

Aqua Rocks Colorado

Fluval FX Series Stainless Steel Lily Pipes Set

(6)

$119.99$129.99

Cat enrichment essentials

Valerian toys, lickables, and puzzle feeders.

Aqua Rocks Colorado

Micranthemum tweediei 'Monte Carlo' - Tropica

(1)

$12.99

Aqua Rocks Colorado

Netlea AT5S Gen 3 - Voice Activation - Latest

(3)

$129.99

Aqua Rocks Colorado

Hose Tubing Pipe Green Flexible - Per Foot

$2.79

KensFish.com

Fluval BIO CO2 125 L Diffuser

$14.99

Aqua Rocks Colorado

Liquid Super Glue 50G

(5)

$9.99

Aqua Rocks Colorado

Anubias barteri Nana- Tropica

$12.99

Aqua Rocks Colorado

Week Aqua Stainless Steel Lily Pipes 13mm and 17mm

$42.99

Aqua Rocks Colorado

Week Aqua Hangkit - V/L/M/Z/P Series

(6)

$14.99

Aqua Rocks Colorado

WEEK AQUA P Series Version 3 - Latest Model

(7)

$329.99

DustinsFishtanks

4.8

(33.5K)

Anubias Nana Petite Aquarium Plant For Sale. This plant is on white and has very small dark green leaves. The leaves are oval shaped that come to a point on the end.

Aqua Rocks Colorado

Cryptocoryne beckettii 'Petchii' - Tropica

$12.99

Aqua Rocks Colorado

Boutique Seiryu

(1)

$50.00

Exclusive offer available

Buce Plant

UNS Controbase

(28)

$34.99

50% off

Aqua Rocks Colorado

CO2 Drop Checker with Fluid

(3)

$9.99$19.99

KensFish.com

Fluval BIO CO2 250 L Diffuser

(2)

$16.69

Aqua Rocks Colorado

Anubias barteri 'Petite' - Tropica

$14.99

Aqua Rocks Colorado

Stainless Steel Mesh for Moss

$2.50

Aqua Rocks Colorado

Almond Leaves for Bettas

(1)

$5.00

Rainy day gear

Mats, towel hooks, and odor control.

Aqua Rocks Colorado

Ohko Dragon Stone

(6)

$20.00

Aqua Rocks Colorado

Black Mountain Seiryu Stone

(5)

$40.00

Aqua Rocks Colorado

Netlea Nano HOB Canister Filter

(1)

$79.99

Aqua Rocks Colorado

Aluminum Light Hanger for LED Lights

(2)

$34.99

PetDesignZ

CO2Art Inline CO2 Diffuser System for Planted Aquariums by CO2Art

$39.99

27% off

Aqua Rocks Colorado

WEEK AQUA S Series - Nano

(5)

$95.00$129.99

Aqua Rocks Colorado

Eleocharis Pusilla - TC (Dwarf Hairgrass Mini)

(1)

$12.99

Aqua Rocks Colorado

Ancient Manten Stone

(1)

$60.00

Chihiros WRGB II PRO LED lighting hanging kit with adjustable mounting arms for aquarium illumination.

Exclusive offer available

Buce Plant

Chihiros WRGB II PRO LED Light Hanging Kit

(9)

$24.99

20% off

Aqua Rocks Colorado

Yugang Stainless Steel Horizontal CO2 Reactor

(3)

$119.99$149.99

Aqua Rocks Colorado

Fluval FX Series Lily Pipes Set V2 - Acrylic

(2)

$89.99

Aqua Rocks Colorado

Riccardia chamedryfolia - TC - Medium

$22.99

Aqua Rocks Colorado

Stainless Steel Canister Filter Ver 2 - ARC with Upgraded Pump

$399.99

Aqua Rocks Colorado

Oase Crystal Skim

(2)

$43.99

13% off

Aqua Rocks Colorado

Aqua Rocks Colorado Tweezer

$12.99$14.99

Aqua Rocks Colorado

Week Aqua Shades M L P Series

(2)

$19.99

Aqua Rocks Colorado

Nano CO2 Diffuser

(2)

$9.99

Comforting picks for pups

Crate covers, lick mats, and calming aids.

Aqua Rocks Colorado

Elephant Skin Stone - Light Gray

(2)

$40.00

19% off

HIRO Aquatics

QANVEE Inline CO2 Aquarium Atomizer Diffuser

(2)

$21.99$26.99

Aqua Rocks Colorado

APT Fix - The 2HR Aquarist

(1)

$17.99

Aqua Rocks Colorado

Anubias Heterophylla - Pot

$12.99

13% off

Aqua Rocks Colorado

Netlea External Filter No. 2V

$329.99$379.99

UNS Pro Filter Tubing by UNSFILTER, flexible clear filter tubing for aquarium or filtration systems, shown in a close-up image

Exclusive offer available

Buce Plant

UNS Pro Filter Tubing

(33)

$8.99

Inline CO2 Diffuser (19mm & 25mm) - Fluval FX

Reviews

Delivery & Returns

Aqua Rocks Colorado

Reviews

Delivery & Returns

Aqua Rocks Colorado

You might also like

Silicone Tubing - Food Grade

Aquarium CO2 Reactor V4 by ARC

The 2HR Aquarist All-in-one APT Complete

Anubias barteri Coin Leaf - Pot

Chihiros WRGB II PRO LED Light

CO2Art Inline CO2 Aquarium Atomizer Diffuser System

CO2Art.us

Alternanthera reineckii 'Mini' - TC

Neo In-tank CO2 Diffuser - Stainless Steel

WEEK AQUA M Series Version 3.0 - Latest Model 2025

UNS Atmos Aquarium Light Background

STAINLESS STEEL CO2 DIFFUSSERS

Icelandic Lava Stone

Anubias barteri var Barteri - Tropica

Oase Biomaster 2 Thermo Canister Filters - Latest Model

Inline CO2 Diffuser Version 2

ARC Premium Dual Stage CO2 Regulator

Neo In-tank CO2 Diffuser - Acrylic

Glass Aqua

Sunsun Inline Heater 300Watt

CO2Art Inline CO2 Aquarium Atomizer Diffuser System

Ultra Pure Rimless Aquarium by ARC

Staurogyne repens - TC

Yugang Horizontal CO2 Reactor - Acrylic

Aquascape Algae Scaper

VIV Classic Lily Pipe

Wild Rihno Stone - Poland - Inert

Seiryu Stone - None Acid Wash

The 2Hr Aquarist

UNS Pro Dual Stage CO2 Regulator

Aqua Forest Aquarium

CO2Art Inline CO2 Aquarium Atomizer Diffuser System

WEEK AQUA L Series Version 3.0 - Latest Model

Alternanthera reineckii 'Rosanervig' - Tropica

Hakkai Stone

SR Aquaristik In-Line CO2 Diffuser

The 2HR Aquarist All-in-one APT Zero

Cryptocoryne wendtii 'Tropica' - Tropica

Double Tap Quick Disconnect Connector

Chihiros Heater Pro

Aquarium Co-Op

Black Spider Driftwood - PreSoaked

Bacopa caroliniana - Tropica

Spiderwood Driftwood

UNS Drop Checker

Fluval FX Series Stainless Steel Lily Pipes Set

Micranthemum tweediei 'Monte Carlo' - Tropica

Netlea AT5S Gen 3 - Voice Activation - Latest

Hose Tubing Pipe Green Flexible - Per Foot

Fluval BIO CO2 125 L Diffuser

Liquid Super Glue 50G

Anubias barteri Nana- Tropica

Week Aqua Stainless Steel Lily Pipes 13mm and 17mm

Week Aqua Hangkit - V/L/M/Z/P Series

WEEK AQUA P Series Version 3 - Latest Model

DustinsFishtanks

Cryptocoryne beckettii 'Petchii' - Tropica

Boutique Seiryu

UNS Controbase

CO2 Drop Checker with Fluid

Fluval BIO CO2 250 L Diffuser

Anubias barteri 'Petite' - Tropica

Stainless Steel Mesh for Moss

Almond Leaves for Bettas

Ohko Dragon Stone

Black Mountain Seiryu Stone

Netlea Nano HOB Canister Filter

Aluminum Light Hanger for LED Lights

CO2Art Inline CO2 Diffuser System for Planted Aquariums by CO2Art

WEEK AQUA S Series - Nano

Eleocharis Pusilla - TC (Dwarf Hairgrass Mini)

Ancient Manten Stone