Hydor Theo 300WHydor

$46

Heater

Hydor Theo 300W

by Hydor

Hydor Theo — Italian-made glass heater with a tamper-proof thermostat ring, PTC self-limiting element, and IPX8-rated safety thermal cut-off.

entry

Power

300 W

Controller ready

Safety

PTC element

from$46

Compatibility with your build

Start a build to see compatibility for this product

Specifications

The full sheet

Specs

Power: 300 W
Controller ready: No
Safety: PTC element

Manufacturer & warranty

Warranty: 2 years

Build & materials

Materials: Glass with PTC film technology
In the box: Theo 300W heater · Suction cup holder

What we check

Rules this part takes part in

Heating capacity

Checks wattage is adequate for your total water volume (about 1 W per litre).

See methodology

Works well with

Compatible tanks

Seapora

Edge Series Reef-Ready 75 Gallon

76 Gallon Shallow EXT

76 gal

View tank

Fiji Cube

57 Gallon Shallow INT-M

57 gal

View tank

Fiji Cube

76 Gallon Shallow INT-M

76 gal

View tank

Alternatives

Others in this category

Frequently asked

What are the key specs of the Hydor Theo 300W?

Power: 300 W. Controller ready: No. Safety: PTC element.

How much does the Hydor Theo 300W cost?

The Hydor Theo 300W starts around $46, though prices vary by retailer — see current offers on this page.

Which tanks is the Hydor Theo 300W compatible with?

Based on ReefPicker's compatibility checks, the Hydor Theo 300W fits tanks including Seapora Edge Series Reef-Ready 75 Gallon, Ultum Nature Systems 60C, Waterbox AIO 65.4. Add it to a build on ReefPicker to check it against your specific tank.