# Aquarium Heater Hagen Marina 25W with Built-in Thermoregulator

**URL:** https://aio.lv/en/product--hagen-vat002856--12020681
**Data updated:** 2026-03-11 20:55 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** Hagen
**Manufacturer code:** VAT002856
**EAN:** 015561112307
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 21.49 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 17.76 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hagen-vat002856--12020681

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

Aquarium heater Hagen Marina 25W with an integrated thermoregulator, designed to maintain stable water temperature in small aquariums. The compact 25-watt heater provides continuous heating and allows precise temperature control via the built-in regulator. Suitable for tropical freshwater or marine setups where reliable, adjustable heating is required.

## Long description

The Aquarium Heater Hagen Marina 25W with Built-in Thermoregulator is a compact submersible heater designed to maintain stable water temperature in small aquariums. Intended for freshwater and marine tropical setups, this unit combines continuous heating with an integrated temperature control that lets you set and maintain a target temperature without a separate external controller. Its small footprint and straightforward adjustment make it suitable for community tanks, nano aquariums and quarantine or breeding containers where precise, reliable heating is required.
Advantages
The Hagen Marina 25W heater provides consistent warmth and automated regulation in a compact, fully submersible design. The built-in thermoregulator allows for simple and precise temperature adjustment without additional equipment. The heater’s size and wattage are optimized for small-volume tanks, reducing temperature fluctuations while consuming low power. Materials and construction are targeted to aquarium use, ensuring safe operation when installed according to instructions.
Suitable for
Small freshwater tropical aquariums
Nano reef or marine setups with limited volume
Quarantine, hospital, or breeding tanks
Desktop or office aquaria where discreet, compact equipment is required
Key specifications
Power output: 25 watts
Installation type: submersible
Built-in adjustable thermoregulator for setting target temperature
Compact dimensions suitable for small aquaria
Continuous heating mode for steady temperature maintenance
How to use
Install the heater fully submerged and secure it vertically or horizontally near water flow for even heat distribution. Connect to a grounded mains outlet and allow the device to reach operating temperature before adjusting the built-in thermoregulator. Set the required target temperature while monitoring with a separate aquarium thermometer to verify accuracy. Avoid powering the heater out of water and disconnect electrical supply before removing it for maintenance.
Usage recommendations
Regularly check water temperature with an independent thermometer and inspect the heater and power cord for damage. For stable conditions in small aquaria, place the heater where circulation will carry warmed water throughout the tank. When planning stocking and filtration, choose heater wattage appropriate for aquarium volume and ambient room temperature; for larger tanks, consider higher wattage or multiple heating solutions.

## FAQ

### How much does the Hagen Marina 25W Aquarium Heater cost, and is it available for purchase?

The price is 21.49 € (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 16.07.2026 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 Hagen 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 Hagen 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/12020681/67509069_large.webp