# hygger BUK-HG159 500W Submersible Aquarium Heater

The hygger BUK-HG159 is a 500W submersible aquarium heater with a digital LED controller and automatic protection claims. Its stated tank range is 220-510L, making that capacity range central to choosing it.

- [Original product page](https://bargainpostbox.co.uk/product/hygger-buk-hg159-500w-submersible-aquarium-heater)
- [View offer](https://bargainpostbox.co.uk/visit/hygger-buk-hg159-500w-submersible-aquarium-heater)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: hygger
- Model: BUK-HG159
- Category: Pet Supplies > Aquariums & Terrariums
- Price: 33.51 GBP
- Previous price: 41.89 GBP
- Discount: 20%
- Price checked: 2026-11-14T10:13:16.593Z
- Rating: 4.6 / 5
- Reviews: 18

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- External controller displays set temperature, current water temperature and real-time power.
- The listing describes an adjustable heater range from 15°C to 34°C and automatic stop with a warning at 36.5°C.
- The controller is described as warning and stopping heating if the water reaches the stated high-temperature threshold.

## Pros

- The external readout and fine adjustment allow temperature settings without relying on an unmarked dial.
- The 500W rating and stated 220-510L tank range suit buyers comparing heaters for larger aquariums.
- A listed warning and automatic stop provide a response to the stated high-water-temperature condition.

## Specifications

### Power and compatibility
- Rated power: 500W
- Suggested tank capacity: 220-510L
- Supply: AC 220-240V/50HZ
- Use: Aquarium
- Freshwater and saltwater: perfect for both freshwater and saltwater aquariums.
### Temperature control and protection
- Heater temperature range: 59°F\(15°C\) to a maximum of 93°F\(34°C\)
- Heating start threshold below set point: 1°F/0.5°C
- High-temperature warning threshold: 97.7°F\(36.5°C\)
- LED display: The LED display shows the set temperature,current temperature, and real-time power
- Temperature adjustment: Turn the knob left/right to decrease/increase the temperature by 0.1°F/0.1°C
- Automatic protection response: When the heater malfunctions and the temperature rises,the system will trigger the lPS after 10 seconds.
### Construction and dimensions
- Heating element material: explosion-proof quartz
- Heating wire: highly temperature-resistant nickel-chromium heating wire
- Heat conductor: silicon carbide
- Heater rod length: 500W heater is 26.6cm long
- Weight listed: 1.08 kg
- Package dimensions: 40.4 x 20.9 x 6.7 cm; 1.08 kg
- Colour: Black
### Product details
- Model number: BUK-HG159
- Quantity: 1
- Batteries required: No

## Before you buy

- The listing details are inconsistent about temperature adjustment: it says a short press increases temperature by 1'F/1'C, while turning the knob adjusts by 0.1°F/0.1°C. It also describes an automatic protection trigger after 10 seconds and separately says heating stops at 36.5°C, without clarifying how these responses relate. Confirm the control steps and protection behaviour before relying on them.

## A good fit for

- Aquarium owners whose tank falls within the stated 220-510L range and who want an external digital temperature display.
- Freshwater or saltwater aquarium keepers seeking a 500W submersible heater with adjustable temperature settings.

## Less suited to

- Buyers needing a heater for tanks outside the stated capacity range or a different input supply.
- Buyers who require independently confirmed protection performance or fully consistent control instructions.

## Customer feedback

The aggregate ratings lean positive, with most ratings in the five-star category, while a smaller share are three-star. That is a limited signal from a small rating sample, not an explanation of performance or a substitute for checking the stated tank range and the unclear temperature-control instructions.

## Frequently asked questions

### What tank size is this heater listed for?
The manufacturer states that the 500W version is for aquariums from 220-510L.
### What temperature range can be set?
The listing gives a heater range of 15°C to 34°C. It also reports a 36.5°C warning and automatic stop, but its description of the adjustment steps is inconsistent.
### Does it have a digital temperature display?
Yes. The listing says the LED display shows the set temperature, current temperature and real-time power.
### Is it described for saltwater tanks?
Yes. The listing states suitability for both freshwater and saltwater aquariums.

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## Images

![hygger BUK-HG159 500W Submersible Aquarium Heater — 1](https://bargainpostbox.co.uk/i/OrV5SUUDQswsl7626_Xfbaw9p1CtUvCHmYKLL2Z-MJElqDrVsTuW3etxBscSym8oVyAI674akw0ThfhgOaW9yu0agPX4xcGZA1RBMCM_25pIIaFLHkC1qkLx.jpg)

![hygger BUK-HG159 500W Submersible Aquarium Heater — 2](https://bargainpostbox.co.uk/i/SSPh7iqlOLuISgNo4stAPbX1NsaGJzx6KVSLeCmha9ZSksebHp4hH_QddeQusJSeOTyFe3N75vMABmvCoCDzE0aNBQmpKwanfm11cWQIxMc6U5BtiRoL0iH7.jpg)

![hygger BUK-HG159 500W Submersible Aquarium Heater — 3](https://bargainpostbox.co.uk/i/Ekhh0j3uICPrC1HknOMoKNaGaybcNMEEkPXNp0BJthGTzGOd84pvZYuZ8kHjyWnT4lKt-TRMgOFHz-XSuP3xtxoHnnzrtv0DjCS-ynaKmVqfK1gqiPC8PjhJ.jpg)

![hygger BUK-HG159 500W Submersible Aquarium Heater — 4](https://bargainpostbox.co.uk/i/Fups4m9lPHpN8RgmzakT1Sl2vfPtz9_u2qPoTRIfs_ARf6mO63jRw7t0eCuPVlQpmrNGrMFMnh0cGW_9Z7RNJWIfg3N9NnnzsvuYKCc371IlpyUhKeZvVCRx.jpg)

![hygger BUK-HG159 500W Submersible Aquarium Heater — 5](https://bargainpostbox.co.uk/i/JMPj_q1IBNTCnAckzAcnW3aWTZx8-qU9ZApxQkF3w8rEKeAEZ-RcFmI9vu1WEQ0aHPOoi5mtxupYMZhFIY2_AzVAyjUwCSdxBHcgDbumiccrtcc_iyPg3lBP.jpg)

![hygger BUK-HG159 500W Submersible Aquarium Heater — 6](https://bargainpostbox.co.uk/i/tn07qYf0b4G3WkNBdIwSxz7OZQWX2wB6sM4nPezWz-rcjtoXjTa0FHPQU6jw1Acc3deNP_Hw2KHXoOcsyHLUjQaKOeJqy0K701bsfVtlD0wW0GHkTzGCsD24.jpg)

![hygger BUK-HG159 500W Submersible Aquarium Heater — 7](https://bargainpostbox.co.uk/i/2NKVVZvLmHmF2wnHfy_MWukpsMsR9iKwi0KOSRTG1XVhaxJF2XdHu2vvjwzgCOQj5pl9SVPTXdflP_Xyx3gkFKTusNjmmKXxgfy5zSb0PiEi-SKWjVYOOsaP.jpg)