Glass Submersible Aquarium Heater – Adjustable 25W–300W Thermostat
Glass Submersible Aquarium Heater – Adjustable 25W–300W Thermostat
Keep Your Aquarium at the Perfect Temperature
The Kesoto Glass Submersible Aquarium Heater delivers fast, consistent warmth for fish tanks, ponds, and aquatic habitats. With a wide adjustable temperature range of 20–34°C (68–93°F) and available in 25W, 200W, and 300W power options, this heating rod is built to suit everything from compact desktop tanks to large freshwater and saltwater setups.
Crafted from high-quality heat-resistant glass with a double waterproof, fully submersible design, it heats efficiently while remaining safe and durable in continuous underwater use.
Made in Mainland China.
Key Features
- Adjustable Temperature: Easy-turn knob lets you dial in temperatures from 20°C to 34°C (68°F–93°F)
- Three Power Options: Choose 25W, 200W, or 300W to match your tank or pond size
- Fully Submersible Design: Double waterproof construction for safe, continuous underwater operation
- High Heating Speed: Reaches your target temperature quickly and maintains it consistently
- Heat-Resistant Glass: Durable borosilicate-style glass body withstands ongoing thermal exposure
- Versatile Compatibility: Suitable for freshwater and saltwater aquariums, ponds, and amphibian habitats
- Simple Installation: Includes suction cup mounts for secure, no-fuss tank attachment
- EU Plug: Compatible with standard EU-format power outlets
Specifications
| Material | Heat-Resistant Glass |
| Power Options | 25W / 200W / 300W |
| Temperature Range | 20–34°C (68–93°F) |
| 25W Dimensions | 195 × 25 mm (7.68 × 0.98 in) |
| 200W / 300W Dimensions | 295 × 25 mm (11.61 × 0.98 in) |
| Plug Type | EU |
| Water Type | Freshwater & Saltwater |
| Target Species | Fish, Amphibians, Marine Life |
What's in the Box
- 1 × Glass Submersible Aquarium Heater (your chosen wattage)
- Suction cup mounts included
Related Products You May Like
- Airtight Transparent PET Storage Bottle | Beads & Crafts
- Ceramic Mini Sealed Storage Jar – Portable Travel Container
- Vintage Baroque Embossed Metal Tray – Jewelry & Decor Organizer
Learn more: U.S. Fish and Wildlife Service
Frequently Asked Questions
Q: What tank sizes are the different wattages suitable for?
A: As a general guide, the 25W heater is ideal for small tanks up to approximately 25 litres, the 200W suits mid-size tanks of 100–200 litres, and the 300W is designed for larger aquariums or outdoor ponds. Always match heater wattage to your water volume for optimal performance.
Q: Can this submersible aquarium heater be used in a saltwater (marine) tank?
A: Yes. The Kesoto glass submersible heater is compatible with both freshwater and saltwater (marine) aquariums. Its fully sealed, double waterproof design makes it safe for use in high-salinity environments.
Q: How do I install the aquarium heater?
A: Simply attach the included suction cups to the glass body and press them firmly against the interior wall of your tank, keeping the heater fully submerged. Turn the adjustment knob to your desired temperature setting. Allow the heater to sit in the water for approximately 30 minutes before plugging it in to prevent thermal shock to the glass.
Q: Is this heater safe to leave running continuously?
A: The heater features a built-in thermostat that automatically cycles on and off to maintain your set temperature, making it safe for continuous operation. Always ensure the heater remains fully submerged during use and never run it outside of water.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.