--- 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" price: "VT10110" currency: VUV in_stock: true reviews_count: 13 url: https://www.desertcart.vu/products/215897741-fluval-p25-submersible-aquarium-heater-25w-shatterproof-and-fully-submersible store_origin: VU region: Vanuatu --- # Fully submersible & waterproof 25W stable heating power 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 **Price:** VT10110 **Availability:** ✅ In Stock ## Summary > 🔥 Keep your nano aquatic world cozy and thriving — no guesswork, just warmth! ## 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 - **How much does it cost?** VT10110 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/215897741-fluval-p25-submersible-aquarium-heater-25w-shatterproof-and-fully-submersible) ## 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 - • **Built to Last:** Durable shatterproof polymer protects your aquatic friends and tank - • **Invisible Comfort:** Compact, fully submersible design fits discreetly in tanks up to 6 gallons - • **Instant Heat Status:** LED indicator glows when actively heating, so you’re always in control - • **Plug & Play Precision:** Preset 76-78°F thermostat for effortless, worry-free heating - • **Versatile Nano Tank Essential:** Perfect for bettas, shrimp, and nano reefs in both freshwater & saltwater ## Overview The Fluval P25 is a 25W submersible aquarium heater preset to maintain a stable 76-78°F temperature, ideal 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 a reliable, hassle-free 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 | |---------------|-------| | Customer Reviews | 4.1 out of 5 stars 740 Reviews | ## 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) ## Available Options This product comes in different **Size** options. ## 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. ### ⭐ Should've got something else *by T***T on August 23, 2023* Edit: It died right at a year in another tank(couldn't let it go to waste). Fluval wants me to ship it on my own dime and pay for return shipping. So it's cheaper to buy a brand new one. Consider this when thinking long term about this heater. First off, I got a DOA. This isn't a big deal, but I should mention it out of the gate. That said, I really do love Fluval products. The heater was purchased for a Fluval Evo 13.5 to replace the glass one that's too long. While the heater is really compact, the suction cup is useless after a week. So it will fall down on top of the return pump. This warped the case of the pump a bit and made it hard to take off and on. I ended up rigging it up with the power cord to keep it from doing more damage. It keeps the water at 80-82°F (26.6-27.7°C) which is really warm for most aquariums. There's no way to change the setting. It will sometimes decide not to work dropping to 72°F (22.2°C) or work too well and jump to 84°F (28.8°C). It may do this in a single day too. This creates a really harsh environment for anything but some hardy fish. Which stinks as this is supposed to be for a nano reef tank. All in all, with the first one being DOA, a suction cup that's worthless, and the simple fact it doesn't do its actual job well I had to rate it a 1 star. I ended up with a non-Fluval brand and now can't be happier. ## 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.vu/products/215897741-fluval-p25-submersible-aquarium-heater-25w-shatterproof-and-fully-submersible](https://www.desertcart.vu/products/215897741-fluval-p25-submersible-aquarium-heater-25w-shatterproof-and-fully-submersible) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-16*