EHEIM disposable 500 g CO2 cylinder for aquariums

Regular price 28,90 €
Regular price Sale price 28,90 €

This disposable 500 g EHEIM CO2 cylinder, with an integrated base and recyclable, supplies a CO2 fertilisation system for a planted aquarium.

It is the cylinder from the EHEIM CO2 Set 200 kit, and it can be bought on its own when the one in the kit is empty.

Ref. H6063000·Aquarium CO2
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The summary

  • What you receive: a disposable 500 g CO2 cylinder with an integrated base.
  • What it is for: supplying gas to a CO2 fertilisation system for a planted aquarium.
  • Why a base: the cylinder stands upright on its own, with no bracket or wall fixing.
  • Once it is empty: it is replaced whole and goes for recycling.
  • What it fits onto: the pressure regulator of the EHEIM CO2 Set 200 kit.
  • Shipping: tracked parcel, with the costs and delivery times shown in the basket according to your address.

Disposable 500 g bottle with integrated base, for an aquarium CO2 system

The EHEIM disposable 500 g CO2 cylinder supplies gas to a fertilisation system for a planted aquarium. Its integrated base lets it stand upright without a bracket or any fixing. It is the cylinder from the EHEIM CO2 Set 200 kit: it screws onto its pressure regulator, is replaced whole when empty, and then goes for recycling.

This EHEIM cylinder holds 500 g of pressurised CO2 and supplies a CO2 fertilisation system for a planted aquarium. It has a built-in base, which means it stands upright on its own inside a cabinet, with no bracket to screw down or strap to tighten. It is the cylinder supplied with the EHEIM CO2 Set 200 kit, and it is the one you buy as a refill when your system no longer delivers gas: you screw it onto the pressure regulator in place of the empty cylinder, without dismantling anything else.

♻️ Disposable and recyclable

A disposable bottle cannot be refilled: once it is empty, the whole bottle is replaced and goes off for recycling. It is the simplest model to use for a first planted tank, since it means you neither have to find a refill point nor go without a bottle while it is being exchanged. On larger setups, the Set 400 and 600 come with a reusable bottle, fitted with a different pressure regulator. The choice is therefore made in advance, when you buy the kit, and a disposable bottle cannot be converted into a refillable one. If you are still undecided, first check how many litres your aquarium really holds, with the decor deducted: that figure decides the kit, and so the type of bottle you will be buying again for years to come.

🔩 What surrounds it

A bottle on its own delivers nothing usable to the tank: it is designed for the pressure regulator of the CO2 Set 200, which brings the high gas pressure down to a flow adjustable with its fine metering valve. The gas then runs through a CO2-proof 4/6 mm pipe to the diffuser, passing through a bubble counter before dissolving in the water. All this equipment can be kept from one bottle to the next, so you only buy the gas again, and the continuous test placed in the tank tells you whether the setting suits your plants.

A regulator

The cylinder delivers its pressure to the regulator, which brings it down to a usable flow.

A CO2 pipe

An ordinary air pipe lets the gas pass through its wall and empties the cylinder.

A diffuser

The diffuser counts the bubbles, then dissolves the gas in the tank water.

A full cylinder should be handled upright

It is a pressurised gas, which can explode when exposed to heat (hazard statement H280). Stand it on its base, away from heat and sunlight, and never loosen the regulator while the cylinder still contains gas. Also check your fitting after each exchange: a slow leak shows up as the bubble counter slowing down without you having touched the setting. As long as the gas is flowing, your permanent test keeps its colour; it is the first thing that will warn you.

A spare bottle to hand for a heavily planted tank

A setup that stops mid-week deprives the plants of carbon while the lighting keeps running, which encourages algae. Keep a spare bottle on hand when your tank is heavily planted, and monitor the pH, which rises as soon as the gas stops. If your setup is not yet assembled, the complete kit includes the regulator, the pipe, the diffuser and the permanent test along with the cylinder.

🔋 How long a cylinder lasts

CO2 is stored as a liquid in the cylinder, so its pressure stays roughly constant as long as liquid remains, then drops rapidly at the end: the bubble rate then falls away within a few days with no warning. How long a 500 g cylinder lasts depends on the flow rate you set and the number of hours of injection per day, not on the volume of the tank. A solenoid valve that cuts the gas when the lighting switches off therefore extends this lifespan considerably. Note the date each cylinder is put into service so that you know its real lifespan on your tank, and order the next one before that date. A cylinder lasts longer the more accurate your setting is, and the continuous test shows you that setting more reliably than the bubble counter alone. A dissolved CO2 drop test also gives you a numerical value when you want to fine-tune the setting.

🧾 After use

The bottle has been tested to TÜV standards and cannot be refilled. Once empty, take it to the recycling bin or the household waste recycling centre, and do not try to open or puncture it. It is intended for planted freshwater aquariums, not marine tanks. Keep it upright, in a cool place and out of direct sunlight, until you put it into use.

Technical specifications

The essentials

Capacity
500 g of CO2
Type
Disposable and recyclableTÜV-tested, it is replaced whole and cannot be recharged.

Installation

Maintenance
Built-in baseThe bottle stands upright on its own in a cupboard.
Purpose
CO2 system for a planted aquariumFreshwater aquarium, up to 200 L

What it replaces

Original kit
EHEIM CO2 Set 200
Connection
Pressure reducer for the Set 200

To budget for separately

Reducer and diffuser
The complete CO2 kit
pH monitoring
A pH test

In the box

  • 1 disposable CO2 cylinder of 500 g with integrated base

Capacity, compatibility, TÜV inspection and recycling taken on 11/10/2026 from the EHEIM pages for the 500 g disposable cylinder and the CO2 Set 200.

Manufacturer and product safety

Manufacturer
EHEIM GmbH & Co. KG
Postal address
Plochinger Str. 54, 73779 Deizisau, Allemagne
Website
eheim.com

Information provided under Regulation (EU) 2023/988 on general product safety.

Three ways to add carbon to a planted tank

This cylinder feeds the third of these three routes. The other two do without pressurised gas.

An empty bottle is the right moment to ask yourself the question again Depending on the size of your tank and the space under the cabinet, the simplest solution is not always the one you already have.

What supplies the carbonNo equipment to installDosing frequencyEquipment to place under the tankWorks without a pressurised bottleSeveral capacities in the catalogueConsumable to replacePrice
Easy-Life EasyCarbo liquid carbon forYour choiceA liquid to pour inYesEvery dayNoYesYesA new bottle5,90 €
JBL ProFlora Advanced fermentation CO2Your choiceFermentation in a tankNoOne charge every 40 daysYesYesNoThe bio-components59,90 €
Recommended
EHEIM pressurised CO2 kit for plantedYour choice		A pressurised bottleNoContinuous adjustment at the regulatorYesNoYesA CO2 cylinder129,90 €
Easy-Life EasyCarbo liquid carbon for
The principle
What supplies the carbonA liquid to pour in
No equipment to installYes
The action
Dosing frequencyEvery day
Equipment to place under the tankNo
The installation
Works without a pressurised bottleYes
Several capacities in the catalogueYes
In the shop
Consumable to replaceA new bottle
JBL ProFlora Advanced fermentation CO2
The principle
What supplies the carbonFermentation in a tank
No equipment to installNo
The action
Dosing frequencyOne charge every 40 days
Equipment to place under the tankYes
The installation
Works without a pressurised bottleYes
Several capacities in the catalogueNo
In the shop
Consumable to replaceThe bio-components
EHEIM pressurised CO2 kit for plantedRecommended
The principle
What supplies the carbonA pressurised bottle
No equipment to installNo
The action
Dosing frequencyContinuous adjustment at the regulator
Equipment to place under the tankYes
The installation
Works without a pressurised bottleNo
Several capacities in the catalogueYes
In the shop
Consumable to replaceA CO2 cylinder

Dosing intervals, volumes covered and contents recorded on 20/09/2026 and 11/10/2026 from the official Easy-Life, EHEIM and JBL pages.

Estimate your
delivery time

Shipped as a tracked parcel from France. The exact costs and delivery times are shown in your basket once the address has been entered. Outside the European Union, import duties and taxes are payable by the recipient.

Frequently asked questions

8 questions

6 key questions, 8 in the detailed view

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