# NICREW Fish Tank Heater 100W with External Controller, up to 100L

Source: https://www.ranked10.co.uk/pet-supplies/best-aquarium-heater/nicrew-100w
Ranked #2 in "Best Aquarium Heater 2026: Ten Ranked on Real Watts per Litre": https://www.ranked10.co.uk/pet-supplies/best-aquarium-heater

- Price: £22.99 (checked on Amazon UK on 2026-09-08)
- Amazon rating: 4.5 from 435 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0CFZTQFPC?tag=ranked10-21

The NICREW 100 W is our number two aquarium heater pick for September 2026, sized for tanks up to 100 litres with an external temperature controller. The listing records 435 ratings at 4.5.

Everything on this page comes from the Amazon listing rather than our own testing.

## Specification

| Field | Value |
|---|---|
| Watts | 100 W |
| Tank size | 40-100 litres |
| Controller | External, adjustable |
| Safety | Auto off above 37 degrees |
| Glass | Shatter resistant quartz |
| Use | Freshwater and saltwater |
| ASIN | B0CFZTQFPC |

## Questions people ask

**What size tank is it for?**

Aquariums up to 100 litres.

**Where is the controller?**

Outside the water, which is safer and easier to read.

**Does it overheat?**

It turns off automatically if water exceeds 37 degrees.

**Is the pool unique?**

No, it is shared with the 300 W version of the same series.

**Can it be installed vertically?**

Yes, with the included suction cups.

**What is the rating?**

4.5 across 435 reviews.