# Aquarium Heater with Thermostat 25 W, 18.5 cm — sera SE-08700

**URL:** https://aio.lv/en/product--sera-se-08700--12055095
**Data updated:** 2026-03-12 19:38 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** sera
**Manufacturer code:** SE-08700
**EAN:** 4001942087001
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 34.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 28.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sera-se-08700--12055095

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

sera aquarium heater with thermostat, 25 W power and 18.5 cm length. Designed to maintain stable water temperature in small aquariums, it features an integrated thermostat for automatic temperature control and compact glass/tube construction for easy placement. Suitable for tropical fish tanks, breeding setups and hobbyist aquaria requiring reliable low-power heating.

## Long description

The sera Aquarium Heater with Thermostat 25 W, 18.5 cm is a compact immersion heater designed to maintain a stable water temperature in small freshwater and tropical aquariums. Its 25 W output and 18.5 cm length make it suitable for low-volume tanks, breeding setups and hobbyist aquaria that require gentle, continuous heating. The integrated thermostat automatically regulates the temperature within a narrow range to reduce fluctuations and support fish health and biological processes.
Advantages
This aquarium heater combines a low power rating with a built-in thermostat to provide energy-efficient, automatic temperature control. The compact glass/tube construction allows for unobtrusive placement inside the tank and simple installation. Robust materials offer corrosion resistance in freshwater use, while the concise design reduces the risk of obstructing decorations or filtration flow. The device is intended for continuous operation, delivering steady warmth appropriate for small tanks and specialized setups.
Suitable for
Small tropical freshwater aquariums
Breeding tanks and fry rearing
Planted nano aquaria requiring gentle heating
Desktop or office aquariums with limited volume
Key specifications
Power output: 25 W
Length: 18.5 cm
Integrated adjustable thermostat for automatic temperature regulation
Glass or tube-style compact construction for internal placement
Designed for continuous low-power operation
How to use
Mount the heater vertically or according to the manufacturer’s instructions inside the aquarium, fully submerged and placed away from direct contact with gravel or decorations. Set the thermostat to the desired temperature appropriate for the stocked species, then allow the heater to reach equilibrium while monitoring the water temperature with an accurate aquarium thermometer. Verify stable operation for several hours before leaving the aquarium unattended and make minor adjustments to the thermostat if needed to achieve the target temperature.
Usage recommendations
Position the heater where there is good water circulation to ensure even temperature distribution. Regularly check the external thermometer and inspect the heater for damage or deposits. For tanks with larger volume or significant heat loss, consider a higher wattage model or additional heating elements to maintain consistent temperatures.

## FAQ

### How much does the sera aquarium heater with thermostat SE-08700 cost, and is it available for purchase?

The price is 34.49 € (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 03.07.2026 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

## Image

https://aio.lv/img/cache/product/12055095/67541140_large.webp