---
product_id: 215897741
title: "Fluval P25 Submersible Aquarium Heater – 25W, Shatterproof & Fully Submersible, Preset 76-78°F for Freshwater & Saltwater Tanks up to 6 Gal, LED Indicator, Safe & Durable Nano Tank Heater"
brand: "fluval"
price: "€ 31.11"
currency: EUR
in_stock: false
reviews_count: 13
url: https://www.desertcart.sk/products/215897741-fluval-p25-submersible-aquarium-heater-25w-shatterproof-and-fully-submersible
store_origin: SK
region: Slovakia
---

# Fully submersible & waterproof 25W stable heating Shatterproof polymer build Fluval P25 Submersible Aquarium Heater – 25W, Shatterproof & Fully Submersible, Preset 76-78°F for Freshwater & Saltwater Tanks up to 6 Gal, LED Indicator, Safe & Durable Nano Tank Heater

**Brand:** fluval
**Price:** € 31.11
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Keep your nano aquatic world perfectly cozy—no fish left out in the cold!

## Quick Answers

- **What is this?** Fluval P25 Submersible Aquarium Heater – 25W, Shatterproof & Fully Submersible, Preset 76-78°F for Freshwater & Saltwater Tanks up to 6 Gal, LED Indicator, Safe & Durable Nano Tank Heater by fluval
- **How much does it cost?** € 31.11 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/215897741-fluval-p25-submersible-aquarium-heater-25w-shatterproof-and-fully-submersible)

## Best For

- fluval enthusiasts

## Why This Product

- Trusted fluval brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Shatterproof polymer housing guards your aquatic friends and your investment.
- • **Discreet & Flexible:** Compact, fully submersible design fits seamlessly in tanks up to 6 gallons.
- • **Instant Heat Status:** LED indicator glows when heating, so you’re always in the know.
- • **Plug & Play Precision:** Preset 76-78°F ensures perfect tropical tank temps—no fiddling required.
- • **Versatile Nano Tank Essential:** Ideal for bettas, shrimp, and nano reefs—freshwater or saltwater, always cozy.

## Overview

The Fluval P25 is a 25W submersible aquarium heater preset to maintain a stable 76-78°F, designed for freshwater and saltwater tanks up to 6 gallons. Its shatterproof polymer construction ensures durability and safety, while the waterproof design allows flexible placement. An LED indicator provides real-time heating status, making it an essential, hassle-free heating solution for nano aquariums.

## Description

Keep your small aquarium at the perfect temperature with the P25 Submersible Aquarium Heater. This 25W heater is pre-set to 76-78°F (24-26°C) for effortless, worry-free use in nano aquariums. Built with a shatterproof polymer exterior, it ensures safety and durability for both freshwater and saltwater tanks up to 6 gallons (25L). Its fully submersible, waterproof design allows flexible placement, while the LED indicator shows when it's actively heating.

Review: Little beta blanket - This thing works like a charm! Just plug and play. Ever since I put it in my Fishtank, my little beta fish are so happy and warm. It’s automatically controlled by the thermostat set at the factory. I was a little freaked out at first when I thought of the idea of buying something that was controlled automatically, but no boiled fish yet! They’re warm and cozy and happy. If you’re on the fence about buying this for your beta fish, look no further than this heater. Buy your little beta fish a blanket before they freeze to death. I’ve been using it for about three months now and it’s held up so far. It’s the perfect size to fit into a 3 gallon aquarium.
Review: Perfect! - This is perfect for my 3 1/2 gallon beta tank! Keeps it the perfect temperature for him. His name is Gill.

## Features

- Preset Temperature for Easy Use: No adjustments needed! The P25 heater maintains a stable 76-78°F (24-26°C), providing an ideal environment for tropical fish in nano aquariums
- Shatterproof & Durable Build: Strong polymer construction resists damage, keeping both your aquarium and aquatic life safe from potential breakage or overheating
- Fully Submersible & Waterproof: Designed for effortless positioning, this compact heater fits discreetly inside any freshwater or saltwater tank up to 6 gallons (25L)
- LED Indicator for Active Heating: The built-in LED light illuminates when the heater is in operation, so you always know when it's working to maintain a consistent water temperature
- Reliable Heating for Small Tanks: Perfect for betta tanks, nano reefs, shrimp habitats, and planted aquariums, ensuring stable, uniform heating in both freshwater and saltwater setups

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B084618P6D |
| ASIN  | B084618P6D |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #25,265 in Pet Supplies ( See Top 100 in Pet Supplies ) #76 in Aquarium Heaters |
| Brand Name | Fluval |
| Color | Black |
| Customer Reviews | 4.1 4.1 out of 5 stars (708) |
| Date First Available | June 23, 2020 |
| Date First Available  | June 23, 2020 |
| Directions | Follow individual packaging instructions. |
| Included Components | All items listed in description |
| Item Dimensions LxWxH | 5.91 x 2.76 x 1.18 inches |
| Item Package Dimensions L x W x H | 9.49 x 3.31 x 2.32 inches |
| Item Weight | 0.19 Kilograms |
| Item model number | A744 |
| Item model number  | A744 |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Manufacturer  | Rolf C. Hagen (USA) Corp. |
| Model Name | Fluval P25 Submersible Aquarium Heater |
| Product Dimensions  | 5.91 x 2.76 x 1.18 inches; 6.77 ounces |
| Size | P25 |
| Specific Uses for Product | Indoor |
| Target Audience Keyword | Fish |
| Warranty Description | 2 Year Limited Warranty |

## Images

![Fluval P25 Submersible Aquarium Heater – 25W, Shatterproof & Fully Submersible, Preset 76-78°F for Freshwater & Saltwater Tanks up to 6 Gal, LED Indicator, Safe & Durable Nano Tank Heater - Image 1](https://m.media-amazon.com/images/I/61p90wDaxML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Little beta blanket
*by A***R on October 31, 2023*

This thing works like a charm! Just plug and play. Ever since I put it in my Fishtank, my little beta fish are so happy and warm. It’s automatically controlled by the thermostat set at the factory. I was a little freaked out at first when I thought of the idea of buying something that was controlled automatically, but no boiled fish yet! They’re warm and cozy and happy. If you’re on the fence about buying this for your beta fish, look no further than this heater. Buy your little beta fish a blanket before they freeze to death. I’ve been using it for about three months now and it’s held up so far. It’s the perfect size to fit into a 3 gallon aquarium.

### ⭐⭐⭐⭐⭐ Perfect!
*by B***P on February 12, 2025*

This is perfect for my 3 1/2 gallon beta tank! Keeps it the perfect temperature for him. His name is Gill.

### ⭐ After 3.5 years, it literally exploded and killed all my animals
*by J***. on January 11, 2025*

I was watching TV when I heard loud gurgling noises from my 10 gallon aquarium. I assumed it was my filter but it was coming from the heater. Of course this was odd. Suddenly, the water around the heater was bubbling very aggressively and then started to shoot out water. It looked like Old Faithful, boiling water shooting out of my open top aquarium, drenching the floor. After being frozen in fear for 2 seconds, I instinctively yanked out the plug and the boiling stopped. There was this weird black powdery stuff all over the surface and it stunk like burned rubber. The worst was the SMOKE coming out of the water and I was worried it would trigger the fire alarm of my building. I looked into my tank and saw my 6 rasboras swimming on their sides, darting and panicking. My 20 cherry shrimp, along with all the baby shrimp were doing the same. I knew they were all as good as dead. There's no way they could survive an underwater nuke caused by Fluval. The heater had a small hole, which I assume got cracked due to poor construction. This caused the toxins to leak out. I can't think of anything I did to have caused this. My last water change was a few days before, the heater was completely submerged, and there were no sudden temperature changes. I read somewhere that heaters should be replaced every 3-5 years. I wish there was a warning when the time was up other than having a mass extinction in my aquarium.

## Frequently Bought Together

- Fluval P25 Submersible Aquarium Heater for Up to 6 Gallons, 25 Watts
- Fluval SPEC Aquarium Kit, Aquarium with LED Lighting and 3-Stage Filtration System, 5-Gallon
- PAIZOO Fish Tank Digital Thermometer Accurate LED Display to ±0.9°F Tank Thermometer Aquarium Temperature Measurement Suitable for Fish, Axolotl, Turtle or Aquatic

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-01*