Free Delivery
Free Delivery, No Fuss
Every order ships free — simple, transparent, and stress-free.
Free Delivery in the UK 🇬🇧
From our warehouse to your door — track every step of the way
We ship worldwide with care
Confirmation email sent instantly
Picked & packed with care
Shipping confirmation sent
On its way to you
Enjoy your purchase!
Note: All delivery timeframes start from the day after you place your order, unless otherwise specified.
Changed your mind? No problem.
Start a return request and tell us about your item. We'll provide a return authorization and detailed instructions.
Pack your item in its original condition with all tags attached. Use our label or your preferred carrier.
Once we receive and inspect your return, we'll process your refund within 5-10 business days.
No! We ship all orders DDP (Delivery Duty Paid). All VAT and customs duties are included in your order total, so there are no surprise fees — even for orders over €150.
IOSS is an electronic portal for handling VAT on EU imports. What this means for you: We include VAT in all prices and handle customs. Your orders ship DDP, so you pay nothing extra on arrival.
You'll receive confirmation emails when your order ships. Gift card purchases don't count towards free delivery. We cannot deliver to military addresses in EU countries. Problems? Contact us.
Promo code - 5% Off your First Order
Maintain the perfect environment for your tropical or marine fish with the Interpet Deltatherm Aquarium Heater. This high-performing, fully submersible unit provides precise and reliable temperature control, ensuring your aquatic life thrives at their ideal temperature.
Before installation, inspect the glass tube for any damage and confirm your mains supply voltage matches the heater specifications. For accurate temperature control, the heater should be positioned diagonally within the aquarium, as the thermostat is located at the top. Once powered on, a red light will illuminate when heating is in progress. The integral thermostat automatically switches the heater off once the desired temperature is reached, indicated by the red light turning off. Use the dial to set your required temperature.
The Interpet Deltatherm 300W heater is engineered for dependable performance, keeping your larger tropical or marine setup stable and healthy.
Interpet Deltatherm Heaters
Six sizes available
Installation and Operation
Place diagonally in the aquarium for accurate temperature control
From our door to yours—rely on our global network for quick and secure delivery, wherever you are.
Your satisfaction is our priority. Enjoy free returns within 30 days, making every purchase completely risk-free.
Rest easy knowing that your financial data is secure with our robust, encrypted payment system.