# CO2 Indicator Fluid Fluval Indykator CO2 for Aquarium, 15 ml

**URL:** https://aio.lv/en/product--fluval-fv-5616--12372483
**Data updated:** 2026-04-26 20:45 (EEST)
**Category:** Other goods
**Manufacturer:** Fluval
**Manufacturer code:** FV-5616
**EAN:** 015561175616
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.99 €
**Prices and availability valid until:** 2026-11-16 23:59
**Price without VAT (21%):** 12.39 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fluval-fv-5616--12372483

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.11.2026 | free |
| Pickup points | 05.11.2026 | 1.99 EUR |
| Courier delivery to door | 05.11.2026 | 4.99 EUR |

## Summary description

Fluval Indykator CO2 is a 15 ml indicator fluid designed to monitor carbon dioxide levels in freshwater aquariums. The solution changes color in response to CO2 concentration, helping aquarists assess gas levels for planted tanks, adjust CO2 dosing and maintain optimal conditions for aquatic plants and fish. Suitable for regular spot checks and visual monitoring.

## Long description

Fluval Indykator CO2 is a 15 ml indicator fluid developed for visual monitoring of carbon dioxide levels in freshwater aquariums. The solution changes color according to dissolved CO2 concentration, allowing hobbyists to quickly estimate gas levels near a test point. Supplied in a compact dropper bottle, the fluid is intended for use with a CO2 indicator tube or directly in small test chambers to support routine spot checks of planted tanks and community aquaria.
Advantages
Fluval Indykator CO2 provides an easy and low-cost way to monitor CO2 concentration without electronic equipment. The color-change response is immediate, enabling rapid assessment of in-tank conditions after adjustments to CO2 dosing or circulation. The 15 ml volume is suitable for multiple spot checks and occasional re-testing, and the small bottle is convenient to store alongside other aquarium maintenance supplies.
Suitable for
 Visual CO2 monitoring in freshwater planted aquariums
 Spot checks after changing CO2 dosing or injector settings
 Assessing CO2 distribution near outlet zones or plant beds
 Hobbyists who prefer simple chemical indicators over electronic sensors
When it may not be suitable
This indicator fluid provides an approximate visual measure rather than precise quantitative readings; it is not a substitute for calibrated electronic CO2 controllers when exact ppm values are required. It may also be less effective in tanks with strong water flow or uneven mixing where local readings do not reflect overall tank levels.
Key specifications
 Volume: 15 ml indicator solution
 Intended application: freshwater aquarium CO2 indication
 Response type: color change correlated with CO2 concentration
 Form: liquid reagent in dropper bottle
 Storage: store in a cool, dark place away from direct sunlight
How to use
Use Fluval Indykator CO2 with an appropriate indicator tube or small test chamber placed in the aquarium where CO2 measurement is needed. Add the recommended number of drops of the indicator fluid to the test area or tube according to the indicator system instructions, allow the color to stabilize, and compare the resulting color to the reference scale provided by the indicator device or manufacturer. Repeat spot checks at different locations and times of day to evaluate variations in CO2 levels.
What to consider before purchase
 Requires an indicator tube or compatible test chamber for correct use
 Provides qualitative/visual indication rather than precise ppm values
 Ensure compatibility with freshwater aquaria and planted setups
Usage recommendations
Perform checks during stable lighting and CO2 injection periods for consistent comparisons. If readings indicate low CO2, review injection rate and circulation; if high, increase surface agitation or reduce dosing. Replace the solution if color response appears weak or if the bottle has been stored improperly.

## FAQ

### How much does the Fluval Indykator CO2 indicator fluid 15 ml cost, and is it available for purchase?

The price is 14.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 02.11.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Fluval products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Fluval service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12372483/69992592_large.webp