# AQQA Aquarium Heater,300W PTC Fish Tank Heater with LED Thermostat Controller,Submersible Aquarium Heater with Protective Cover,Over-Temp Protection,for Fish Tank 110-300L

Source: https://www.ranked10.co.uk/pet-supplies/best-aquarium-heater/aqqa-300w
Ranked #9 in "Best Aquarium Heater 2026: Ten Ranked on Real Watts per Litre": https://www.ranked10.co.uk/pet-supplies/best-aquarium-heater

- Price: £41.99 (checked on Amazon UK on 2026-09-08)
- Amazon rating: 4.5 from 62 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0DCV99JRT?tag=ranked10-21

The AQQA is our number nine aquarium heater pick for September 2026, a 300 W ceramic PTC heater with child lock control for tanks from 110 to 300 litres. The listing records 62 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 | 110-300 litres |
| Heating | Ceramic PTC element |
| Control | External, 0.5 degree steps, child lock |
| Range | 15-34 degrees |
| Codes | EE overheat, Er water level |
| ASIN | B0DCV99JRT |

## Questions people ask

**What is a PTC heater?**

A ceramic element that heats quickly and safely, per the listing.

**How do I set it?**

On the external controller, in 0.5 degree steps with a child lock.

**What does EE mean?**

Temperature above 36 degrees, the overheat warning.

**What does Er mean?**

The heater is not fully submerged.

**Is the controller waterproof?**

No, keep it outside the aquarium.

**What is the price?**

£41.99.