# Water test kit sera 04110 General hardness GH 0.015 L

**URL:** https://aio.lv/en/product--sera-103378--11360237
**Data updated:** 2026-03-10 09:08 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** sera
**Manufacturer code:** 103378
**EAN:** 4001942041102
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 11.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 9.91 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sera-103378--11360237

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The sera 04110 water test kit measures general hardness (GH) with a volume of 0.015 L. It comes in a hanging box and includes 1 piece per pack. This kit is essential for monitoring water quality in aquariums and ensuring optimal conditions for aquatic life.

## Long description

The sera 04110 General hardness GH water test kit (0.015 L) is designed to determine total hardness (GH) levels in freshwater aquariums. Supplied in a compact hanging box with one test kit per pack, it provides a simple chemical titration method to measure carbonate and non-carbonate hardness up to approximately 420 °dGH. Accurate GH measurement helps maintain stable conditions for fish, plants and invertebrates by guiding water treatment decisions.
Advantages
This sera GH test kit delivers clear, quantitative results using a small reagent volume (0.015 L) and a straightforward procedure suitable for hobbyists and experienced aquarists. The kit’s format is compact and easy to store or hang near the aquarium. Test results indicate whether mineral supplementation, dilution with reverse osmosis water, or peat/blackwater treatment is appropriate, supporting predictable water parameter management.
Suitable for
Regular monitoring of freshwater aquarium total hardness (GH)
Assessing need for mineral supplementation or water softening
Preparing water for sensitive species requiring specific hardness
Verifying effects of water treatments such as mineral salts, RO mixing, peat or blackwater
Key specifications
Measured parameter: General hardness (GH)
Reagent volume: 0.015 L
Measurement range: up to approx. 420 °dGH
Packaging: hanging box, 1 piece per pack
Intended use: freshwater aquariums
How to use
Follow the kit instructions supplied with the product. Typical use involves filling the sample vial with aquarium water, adding indicator and titration reagent drop by drop while mixing, and counting drops until the color change indicates the endpoint. Calculate GH according to the included conversion table or instructions to obtain degrees of general hardness. Observe safety instructions for handling reagents and avoid ingesting or spilling chemicals.
Usage recommendations
For too low GH values consider using sera mineral salt to increase hardness. To reduce high GH levels, dilute aquarium water with reverse osmosis (R/O) water. For creating soft, acidic conditions, consider sera blackwater aquatan or filtering water through sera super peat. Repeat testing after any water treatment to confirm desired GH levels.

## Specifications

| Feature | Value |
|---|---|
| Package type | Hanging box |
| Volume | 0.015 L |
| Product type | Water test kit |
| Quantity per pack | 1 pc(s) |
| Measured parameters | General hardness (GH) |
| Suitable for pond water | Yes |
| Suitable for aquarium water | Yes |
| Suitable for freshwater aquarium | Yes |

## FAQ

### How much does the Water test kit sera 04110 cost, and is it available for purchase?

The price is 11.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 11 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 14.07.2026 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 sera 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 sera 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

### Where can I download the instructions for Water test kit sera 04110?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/11360237/65843674_large.webp