--- product_id: 215897741 title: "Fluval P25 Submersible Aquarium Heater" price: "€ 56.91" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.fr/products/215897741-fluval-p25-submersible-aquarium-heater store_origin: FR region: France --- # Fully submersible & waterproof Preset 76-78°F stable temp Shatterproof polymer build Fluval P25 Submersible Aquarium Heater **Price:** € 56.91 **Availability:** ✅ In Stock ## Summary > 🌊 Keep your nano world perfectly cozy—no guesswork, just warmth. ## Quick Answers - **What is this?** Fluval P25 Submersible Aquarium Heater - **How much does it cost?** € 56.91 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/215897741-fluval-p25-submersible-aquarium-heater) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Heat Status:** LED indicator lets you know exactly when your heater is working. - • **Seamless Integration:** Compact, fully submersible design fits discreetly in tanks up to 6 gallons. - • **Effortless Temperature Control:** Preset to an ideal 76-78°F for tropical nano tanks—no fiddling required. - • **Built to Last, Built for Safety:** Durable shatterproof polymer protects your aquatic life and investment. - • **Versatile for Every Nano Habitat:** Perfect for bettas, shrimp, planted tanks, and nano reefs in freshwater or saltwater. ## Overview The Fluval P25 Submersible Aquarium Heater is a 25W, preset heater designed for nano aquariums up to 6 gallons. It maintains a stable temperature between 76-78°F (24-26°C) with a durable, shatterproof polymer casing. Fully submersible and waterproof, it features an LED indicator to show active heating, making it ideal for small freshwater and saltwater tanks housing tropical fish, shrimp, and plants. ## 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: compact design - This is a nice little heater for a small tank. I have a 2.6 gallon tank, and this heater fits perfectly in one of the filtering chambers. Its a fixed temp (non-adjustable), but seems to work great. Review: Heater runs too hot. - I bought this heater because of the Fluval name. It is supposed to be preset to 76-78 degrees. It is actually set to 82 which is too warm for my tank. ## 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 | |---------------|-------| | Customer Reviews | 3.8 out of 5 stars 272 Reviews | ## Images ![Fluval P25 Submersible Aquarium Heater - Image 1](https://m.media-amazon.com/images/I/61p90wDaxML.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ compact design *by T***R on March 6, 2023* This is a nice little heater for a small tank. I have a 2.6 gallon tank, and this heater fits perfectly in one of the filtering chambers. Its a fixed temp (non-adjustable), but seems to work great. ### ⭐ Heater runs too hot. *by C***K on June 20, 2026* I bought this heater because of the Fluval name. It is supposed to be preset to 76-78 degrees. It is actually set to 82 which is too warm for my tank. ### ⭐⭐⭐⭐⭐ Work’s great *by M***N on April 29, 2024* I purchased this heater for a 5 gallon betta tank. The heater is set to the temperature they need. It’s a no hassle addition to my tank. Just check the tank’s temperature now and the . ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.fr/products/215897741-fluval-p25-submersible-aquarium-heater](https://www.desertcart.fr/products/215897741-fluval-p25-submersible-aquarium-heater) --- *Product available on Desertcart France* *Store origin: FR* *Last updated: 2026-08-14*