Can I use sparkling water in the aquarium as a source of CO2?

Yes, you can use sparkling water in the aquarium as a source of CO2 by putting a full bottle in the aquarium and making a small hole to release co2. It is a well-known fact that plants absorb carbon dioxide and give off oxygen. Sooner or later people agree with this concept that occurs in an aquarium. Ultimately people discover that experience herb growers already have come to the same conclusion: It is inevitable to provide the aquarium with plants with CO2. Carbon dioxide can be supplied to the aquarium in several ways: by means of a balloon, tablets, specialized fertilizers, and even sparkling water. In this article, I will focus on use sparkling water in the aquarium as a source of CO2 and a review of that method.

DIY aquarium CO2 system using soda water, for aquascaping

Can I use sparkling water in the aquarium as a source of CO2?

A carbon dioxide balloon is the most convenient and efficient way to increase carbon dioxide levels, so I prefer to install a cylinder with a fine-tuning tap. Today’s article is, however, about CO2 being derived from sparkling water. In small aquariums, soda water is considered to be a reasonable additive.

What exactly is sparkling water, as far as its essence is concerned? It has a concentrated C02 (carbon dioxide) in it. When opening the bottle from 4000 mg/l to 10000 mg/l, after which it will slowly begin to decrease to 1500 mg/l. The concentration of CO2 in tap water is typically between 2 and 4 mg per liter. In an aquarium without any flow of CO2, it is not greater than 1 mg/L. The most essential element of the method is to mix the aquarium water with a concentrate and have it attain a level of around 10-15 mg/L. This is approximately how much is required for the majority of aquatic plant species. However, there are species that require up to 30 mg/L, so do some research on your plants to find out what their required dosage might be.

The correct dosage of sparkling water as a source of CO2.

The goal is to ensure there is equal distribution of sparkling water in the aquarium. The lack of tests makes it extremely difficult to determine. If the plan is not properly formulated, it could lead to unanticipated results like the death of fish. The goal is to keep the level of carbon dioxide (C02) at 10 mg per liter. This rule is used on average every morning you must add 20 ml to 10 liters of sparkling water. There are various types of soda and the cost is variable depending on the kind used and the price of the soda. For this reason, test it.

Of course, it is highly undesirable for the soda to be overly salty and without flavor additives. I advise you to take the simplest water, as most water bottled under the mineral classification is actually just tap water.

The advantages and disadvantages of sparkling water in the aquarium as a source of CO2.

It is pretty easy to add sparkling water in an aquarium for CO2, and it is more convenient, but on top of the advantages, it has some considerable disadvantages. Consider all the advantages and disadvantages.


  • extremely simple to use
  • Effective for aquariums under ten gallons
  • cost savings in equipment


  • When the amount of carbon dioxide changes, the growth, and health of plants and fish can be impacted.
  • It is necessary to make a deposit every day.
  • Observe and maintain constant measurement

Fishkeepers have a drastically different experience when using sparkling water as a source of CO2. But even if nothing is done, it’s still better than doing nothing.