# NICREW Fish Tank Heater 300W with External Controller, up to 300L

Source: https://www.ranked10.co.uk/pet-supplies/best-aquarium-heater/nicrew-300w
Ranked #3 in "Best Aquarium Heater 2026: Ten Ranked on Real Watts per Litre": https://www.ranked10.co.uk/pet-supplies/best-aquarium-heater

- Price: £26.99 (checked on Amazon UK on 2026-09-08)
- Amazon rating: 4.5 from 435 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0CFZWWCZL?tag=ranked10-21

The NICREW 300 W is our number three aquarium heater pick for September 2026, the larger version of the same controller design for tanks from 200 to 300 litres. 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 | 300 W |
| Tank size | 200-300 litres |
| Controller | External, adjustable |
| Safety | Auto off above 37 degrees |
| Glass | Shatter resistant quartz |
| Use | Freshwater and saltwater |
| ASIN | B0CFZWWCZL |

## Questions people ask

**What size tank is it for?**

Aquariums from 200 to 300 litres.

**What makes it different from the 100 W?**

Only the wattage and the tank size rating.

**Is the review pool shared?**

Yes, with the 100 W listing of the same series.

**Does it shut off when too hot?**

Yes, above 37 degrees.

**Can it run in saltwater?**

Yes.

**What is the rating?**

4.5 across 435 reviews.