--- product_id: 300527262 title: "Hydor Theo Shatterproof Aquarium Heater, 400-Watt & Ideal For 80 To 105 Gallon Fish Tanks, 15.5 Inches Long" brand: "hydor" price: "VT38798" currency: VUV in_stock: true reviews_count: 6 url: https://www.desertcart.vu/products/300527262-hydor-theo-shatterproof-aquarium-heater-400-watt-and-ideal-80 store_origin: VU region: Vanuatu --- # 80-105 Gallons 400W Power Shatterproof Design Hydor Theo Shatterproof Aquarium Heater, 400-Watt & Ideal For 80 To 105 Gallon Fish Tanks, 15.5 Inches Long **Brand:** hydor **Price:** VT38798 **Availability:** ✅ In Stock ## Summary > 🔥 Keep Your Fins Happy and Safe! ## Quick Answers - **What is this?** Hydor Theo Shatterproof Aquarium Heater, 400-Watt & Ideal For 80 To 105 Gallon Fish Tanks, 15.5 Inches Long by hydor - **How much does it cost?** VT38798 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/300527262-hydor-theo-shatterproof-aquarium-heater-400-watt-and-ideal-80) ## Best For - hydor enthusiasts ## Why This Product - Trusted hydor brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Design:** Efficiently heats your tank with a sleek 15.5-inch profile. - • **Maximum Safety:** Experience peace of mind with shock-resistant technology. - • **Versatile Positioning:** Easily install in any orientation with included suction cups. - • **Universal Compatibility:** Perfect for both freshwater and marine environments. - • **Self-Regulating Technology:** Stay worry-free with automatic shut-off during malfunctions. ## Overview The Hydor Theo 400-Watt Aquarium Heater is a fully submersible, shatterproof glass heater designed for 80 to 105-gallon fish tanks. With advanced safety features and versatile positioning options, it ensures optimal temperature control for both freshwater and marine environments. ## Description Hydor Theo Shatterproof Aquarium Heater, 400-Watt & Ideal For 80 To 105 Gallon Fish Tanks, 15.5 Inches Long ## Features - Hydor Theo 400-Watt Aquarium Heater is a fully submersible; shatter-proof glass aquarium heater ideal for 80-to-105-gallon fish tanks; measures 15.5 inches long - Maximum Safety Aquarium Heater; THEO fish tank heater is shock resistant thanks to the patented PTC heating element and the shatterproof glass tube - Free positioning in aquarium with supplied suction cups; The Theo aquarium heater can be placed in the fish tank vertically, horizontally and fully submerged - Self-Control Limiting Technology; If heater senses abnormal functioning patented PTC heating system guarantees completely safe operation in case of dry running - Great Fish Tank Heater for All Fish Tanks; Universal aquarium heater for use in fresh water or marine water fish tanks ## Product Details - **Brand:** Hydor - **Color:** Black - **Material:** Plastic - **Style:** 400 watt - **Power Source:** Corded Electric - **Item Weight:** 8 ounces - **Voltage:** 120 Volts (AC) - **Manufacturer:** Hydor USA, Inc. - **UPC:** 798549197458 841421003207 617407608632 - **Specific Uses For Product:** Indoor ## Images ![Hydor Theo Shatterproof Aquarium Heater, 400-Watt & Ideal For 80 To 105 Gallon Fish Tanks, 15.5 Inches Long - Image 1](https://m.media-amazon.com/images/I/81pwYfm1VNL.jpg) ![Hydor Theo Shatterproof Aquarium Heater, 400-Watt & Ideal For 80 To 105 Gallon Fish Tanks, 15.5 Inches Long - Image 2](https://m.media-amazon.com/images/I/710U0jkApzL.jpg) ![Hydor Theo Shatterproof Aquarium Heater, 400-Watt & Ideal For 80 To 105 Gallon Fish Tanks, 15.5 Inches Long - Image 3](https://m.media-amazon.com/images/I/61unKaS2akL.jpg) ![Hydor Theo Shatterproof Aquarium Heater, 400-Watt & Ideal For 80 To 105 Gallon Fish Tanks, 15.5 Inches Long - Image 4](https://m.media-amazon.com/images/I/71YQjmh0nXL.jpg) ![Hydor Theo Shatterproof Aquarium Heater, 400-Watt & Ideal For 80 To 105 Gallon Fish Tanks, 15.5 Inches Long - Image 5](https://m.media-amazon.com/images/I/71u4XJ9QTtL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐ Blasting *by R***D on Reviewed in India 🇮🇳 on 21 November 2018* From my Aquriam this heater blasted with in one hour ### ⭐⭐ It worked for 2 months. *by Z***E on Reviewed in Canada 🇨🇦 on 8 June 2020* I really liked this heater at first but 2 months in use now and it doesn't work correctly anymore, save your money and buy a different one. I would return it if I could.Problems with this heater:- It is not accurate, or consistent, may as not even have a temperature knob as it doesn't work.- 2 months of use and water is leaking into the inside glass which makes this heater no long useful in anywayThis is the first time I have used this brand of heater and will be the last. I decided to give it a try as I have liked other Hydor products in the past but this heater is no good, I would not recommend it to anyone. ### ⭐⭐⭐ Avoid!! *by C***E on Reviewed in Canada 🇨🇦 on 2 August 2019* I used a K-type thermocouple to adjust this to the temperature I actually wanted, since the dial on the heater is a good 10+ degrees f off. Otherwise it seems to be very consistent once set, so I dont actually see this as too big a deal once you get it adjusted. I'd recommend not just dumping it in a running aquarium though, calibrate it in a bucket or something.Edit: a month later and it will no longer maintain the temperature in my tank. It's slowly cooling down. Avoid this heater. Also it's only 250w not 300 as advertised. Junk! --- ## 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/300527262-hydor-theo-shatterproof-aquarium-heater-400-watt-and-ideal-80](https://www.desertcart.vu/products/300527262-hydor-theo-shatterproof-aquarium-heater-400-watt-and-ideal-80) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-06*