Maintain a safe and stable water temperature with the TMC Therm Aquarium Heater range – reliable, fully submersible heaters designed to provide precise temperature control for both freshwater and marine aquariums.
Available in 50W and 100W models, the Therm range offers dependable heating performance for aquariums of all sizes, helping create the ideal environment for tropical fish, plants and marine livestock.
Product Overview
A consistent water temperature is essential for the health and wellbeing of aquarium inhabitants. The TMC Therm range combines durable construction with accurate temperature control, making it an excellent choice for everyday aquarium heating.
Each heater features a high-performance heating element housed within 2mm shatter-resistant quartz glass, ensuring long-lasting reliability and excellent heat transfer. The fully sealed design allows complete submersion and flexible installation, while the integrated thermostat automatically maintains your chosen temperature.
Suitable for both tropical freshwater and marine aquariums, Therm heaters are simple to install, easy to adjust and built to provide years of dependable service.
Key Features
- Precise and reliable adjustable temperature control
- Adjustable temperature range from 20°C to 34°C
- High-performance heating element for rapid, even heating
- Durable 2mm shatter-resistant quartz glass construction
- Fully sealed and completely submersible
- Can be installed vertically, horizontally or diagonally
- Easy-to-read temperature adjustment scale
- LED indicator shows when the heater is actively heating
- 1.5m power cable for flexible installation
- Suitable for freshwater and marine aquariums
- Available in multiple wattages to suit different aquarium sizes
Available Models
50W - Ideal for aquariums up to 60 litres.
100W - Suitable for aquariums up to 120 litres.
Installation Tip
Install the heater in an area of good water circulation, such as near your filter outlet, to ensure even heat distribution throughout the aquarium. Always allow the heater to acclimatise in the water for 15–30 minutes before switching it on, and regularly check the temperature using a quality aquarium thermometer.
Delivery
Delivery costs for your order will be calculated during the checkout process based on your delivery address and the contents of your basket. You will only pay one delivery charge for your order. Express delivery is FREE for online orders OVER £39 unless any of the points below become a factor.
- Some large items like aquariums, ponds and pond liners will have an additional charge of £45.00 to help offset the cost of a pallet delivery.
- Orders containing a physical gift card will have an additional charge of £2.45 to cover the cost of materials and delivery (digital gift cards are a free alternative).
- Orders to highlands, islands and Northern Ireland may incur an additional delivery charge displayed at checkout this is based on the postal code provided. DPD provides a list of postal codes which have additional surcharges. Some of these post codes may also take 2 working days to arrive, even on express. Pallet deliveries cannot be sent to these post codes.
We only ship to the UK and cannot ship internationally.
We aim to dispatch items that are currently in stock on the same working day if they are ordered before 2.45 pm (excluding Bank Holidays). Orders after 3pm will be dispatched the following working day, unless it fits any of the below criteria:
- Orders containing live plants will take up to 2 weeks to arrive. We take a week's worth of customer orders and then inform the plant farms of the specific quantities we need to fulfil that week's order to avoid wastage.
- Pallet orders containing large items like big aquariums will take additional time to arrive as they are sent by a third party. These orders will NOT be dispatched until we have been in touch to arrange a delivery date, this is to ensure someone is available at your address to sign for the delivery. Deliveries will generally be delivered ‘curb side’ within the terms of the agreement we have with our couriers so you will need to make arrangements to transfer larger items into your home yourself. Unfortunately, our drivers are not insured to transfer the aquarium into your home.
- Physical gift cards and items from the gift shop (such as clothes, towels etc) are sent with 1st Class Royal Mail. Delivery usually takes 1-2 working days, though in rare cases and orders placed closer to public holidays (Christmas, Father’s day, Mother’s day etc.) may be longer.
Returns
If you are not 100% satisfied with your purchase online from our website, you can return the product and get a full refund or exchange the product for another one, for up to 21 days from the date you purchased it.
We strongly suggest signing up for an account with fishkeeper.co.uk as this will allow for some additional returns options like return to your local store.
If you checkout as a guest you will need to return the product to Maidenhead Aquatics, PO Box 619, Egham, Surrey, TW20 2BS, please package the order (along with a packing slip or a note including your name, address and order number).
Large pallet items like aquariums are deemed delivered successfully with no damage once the the driver has left the property. If a report of damage is submitted after the driver has left we may be unable to assist with replacements. We recommend refusing a damaged delivery, this is the fastest resolution.
Our full terms and conditions can be found here. When you place an order with us online you are agreeing to these terms and conditions.
For delivery before Christmas, orders must be placed on or before 3pm on Wednesday 20th December. We cannot guarantee delivery of these orders pre-Christmas as we are reliant on our couriers, but will use our best endeavours to get orders placed on this date out to you before Christmas. For full details of our festive delivery and opening times click here
Please note: online orders placed after 3pm on Friday 22nd December will not be dispatched until the New Year. For full details of our festive delivery and opening times click here