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Marina Submersible Pre-Set Heater 200W

Code: 11235
  • £13.99
Item in Stock   |   Usually dispatched within 24 hours
Powerful 200-watt Marina Submersible Aquarium Heater provides reliable heating for fresh or saltwater aquariums up to 200 litres (55 US gal) aquariums.
The heater includes many practical features for easy use, safety and convenience, including an easy-to-access temperature set dial, on/off pilot light indicator, and a bumper guard for fish safety. Made of durable high-impact glass, it's built to last under normal aquatic conditions. Key Features- 200-watt submersible heater for fresh or saltwater aquariums- Length: 27 cm (10.6")- For 200 L (55 US gal) aquariums- Easy-to-access temperature set dial- Easy-to-read temperature settings- On/Off pilot light indicator- Impact-resistant glass design- Bumper guard for fish safety- Waterproof sealing- Pilot light- Includes bracket with suction cups for easy, secure installation- CSA approved- 1.8-metre electrical cord- Temperature heating range: 20° C to 28° C (68° F to 82° F)
What dose a heater do in a fish tank?

A heater in a fish tank is used to maintain a consistent, appropriate water temperature for the fish and other aquatic life living in the tank. Different species of fish have different temperature requirements, so it's important to ensure that the water temperature in the tank is within the appropriate range for the specific type of fish you are keeping.

In general, most tropical fish need a water temperature in the range of 24-28 degrees Celsius. Coldwater fish, such as goldfish, may prefer water that is slightly cooler, around 20-23 degrees Celsius.

A heater in a fish tank helps to maintain a stable water temperature by using an electric heating element to warm the water. The heater is typically placed inside the tank and connected to a thermostat that measures the water temperature and turns the heater on or off as needed to maintain the desired temperature.

It's important to monitor the water temperature in your fish tank regularly and to adjust the heater as needed to ensure that the temperature stays within the appropriate range for your fish. If the water temperature gets too cold, the fish may become sluggish and inactive, and may be more prone to illness. On the other hand, if the water temperature gets too hot, the fish may become stressed and may also be more prone to illness.

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Next Day Shipping Upgrade - Cut off Midday (12 pm)

Please Note: We only deliver ponds and pond plants on our own delivery vehicles!

The blue highlighted area on the map below is where we deliver on our own vehicle! Unfortunately, if you are not in one of these postcode zones we are unable to deliver certain items such as plants, small glass items and selective other products.



We offer a few different delivery options depending on the size and value of your order.

Orders over £50 qualify for free mainland UK (excludes Northern Ireland) delivery which will arrive within 3-5 working days of the order being processed.


Residents of Northern Ireland, please provide your EORI or XI Number.

If you do not have one, please follow the information at


Orders Below £50 in Mainland UK will be charged a standard delivery fee of £5.99.

Additional Shipping Charges

For any orders that do not include Aquariums, the below is charged:

Next Working Day Parcel Delivery to Mainland UK - £7.99 OR £2.99 if the order is over £50

Standard Parcel Delivery to Northern Ireland £8.99

Standard Parcel Delivery to Scottish Highlands & Islands £9.99

Standard Parcel Delivery to Jersey & Guernsey £12.99


For all Aquarium deliveries (Excluding biOrbs & Smaller Aquariums), the below is charged:

Next Working Day Pallet Delivery - £20

2 Hour Booking Slot Pallet Delivery - £20

Pallet Delivery to Northern Ireland - £38

Pallet Delivery to Isle of Wight (PO36 and Above) and Scottish Highlands (AB, PH, IV1-36, IV63, KW1-14, KY, PA21-41) - £38

Pallet Delivery to Southern Ireland - £48

Pallet Delivery to Offshore postcodes (KA27-28, PA20, PA42-49, PA60-90, ZE, JE, GY. IM) - £70

Pallet Delivery to the Scottish Isles (IV40-56, KW15-17) - £90

Pallet Delivery to Outer Hebrides (HS) - £120