# Water test reagent sera Phosphate-Test (PO4) – phosphate measurement, 0.015 L

**URL:** https://aio.lv/en/product--sera-03502--12268411
**Data updated:** 2026-04-16 06:00 (EEST)
**Category:** Aquarium Supplies
**Manufacturer:** sera
**Manufacturer code:** 03502
**EAN:** 4001942049306
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 12.39 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sera-03502--12268411

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

sera Phosphate-Test (PO4) is a water test reagent for measuring phosphate (PO4) concentration in aquariums and freshwater systems. Supplied as a 0.015 L reagent in a hanging box, it provides chemical reagents needed for colorimetric phosphate analysis and routine water monitoring to detect nutrient levels and prevent algae growth.

## Long description

sera Phosphate-Test (PO4) is a liquid reagent set for colorimetric determination of phosphate concentration in freshwater and marine aquaria. Supplied in a 0.015 L reagent bottle, the test helps hobbyists and aquarium keepers monitor nutrient levels that can encourage unwanted algae growth and enables timely corrective action.
Advantages
The sera PO4-Test is simple and fast to use, offering clear visual results for routine monitoring of phosphate levels. The kit is compact and provides enough reagent for approximately 60 individual measurements, making it suitable for regular checks. Excess phosphate detected with this test can be addressed using compatible sera phosphate-removal products for freshwater, marine aquaria, or ponds.
Suitable for
Routine phosphate monitoring in freshwater aquaria
Phosphate checks in marine reef and fish tanks
Preventing and diagnosing algae problems related to nutrient excess
Regular water quality control by hobbyists and small-scale keepers
When it may not be suitable
This reagent set is designed for routine phosphate (PO4) screening and provides colorimetric results rather than highly precise laboratory-grade analyses. For legal compliance testing, research-grade quantification, or measurements requiring trace-level accuracy beyond the kit’s range, a certified laboratory method is more appropriate.
Key specifications
Form: liquid reagent
Volume: 0.015 L reagent bottle
Measurement method: colorimetric phosphate (PO4) test
Approximate number of tests: 60 measurements
Intended use: aquarium and pond water phosphate monitoring
How to use
Follow the included instructions to add the specified reagent drops to a sample of aquarium water, mix and compare the resulting color against the provided reference scale to determine phosphate concentration. Use the result to decide whether to perform a water change or apply a suitable phosphate-removal product. Rinse and store the reagent bottle as directed to preserve accuracy for future tests.
What to consider before purchase
Intended frequency of testing and estimated number of measurements (approx. 60 per bottle)
Whether colorimetric results meet your accuracy needs or if laboratory analysis is required
Compatibility with sera phosphate removal products if treatment is needed
Usage recommendations
Perform regular tests after feeding or maintenance and compare results over time to detect trends; treat elevated phosphate promptly with appropriate sera phosphate removers and follow product instructions for dosing and water changes.

## Specifications

| Feature | Value |
|---|---|
| Country of origin | Germany |
| Package type | Hanging box |
| Volume | 0.015 L |
| Product type | Water test reagent |
| Measured parameters | Phosphate (PO4) |
| Number of tests | 60 |
| Suitable for pond water | Yes |
| Suitable for aquarium water | Yes |

## FAQ

### How much does the sera Phosphate-Test (PO4) water reagent 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 — 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 06.07.2026 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 sera Phosphate-Test (PO4) water reagent?

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/12268411/68188183_large.webp