Oase BioPlus Thermo Internal Filter (& Heater)

Tell us about a better offer

Enter all the details of where you have found the product cheaper and if it’s legitimate we will send you a voucher code to buy the product at the cheaper price. Please ensure you include a valid URL. You will receive a notification via email within 48 hours to let you know if your price match has been accepted. Terms and Conditions apply, click here to view.

Oase BioPlus Thermo Internal Filter (& Heater)
Available in selected stores only
Ask us about this product

Find Your Nearest Store by location or postcode

And/or by Store Specialities

Search for a store by specialities


  • The 50 is recommended for Aquariums up to 50 L
  • The 100 is recommended for Aquariums up to 100 L
  • The 200 is recommended for Aquariums up to 200 L
  • For fresh and saltwater aquariums
  • EasyClean mechanism means extremely easy cleaning
  • Economical and energy saving
  • Compartment to incorporate HeatUp aquarium heater (Included)
  • This product comes with a 3+1 year warranty. Contact Oase to extend your warranty 

Internal Filters are an excellent option for small to medium sized aquaria. They are simple and easy to set up, they sit just inside the aquarium itself meaning they can be easily installed into any fish tank, with no troublesome pipes and hoses. They will also work well as a powerhead for water circulation, with the added bonus of the extra filtration. It is worth noting that you should clean your filters impellor every couple of weeks to ensure it is functioning normally and keeping the water moving around the tank. 

Key Features

Inconspicuous Design with Integrated Heater
The Bioplus Internal filters from Oase are effectively concealed and quite inconspicuous, with no disturbing diffuser tube, but rather an integrated, adjustable diffuser nozzle. They have an integrated compartment to house a HeatUp adjustable heater. The heater is included! The suction holder allos for easy fastening in the corner of the aquarium.

EasyClean Maintenance
It's EasyClean mechanism means extremely easy cleaning, only the filter unit is removed. The high volume of the filter foams ensures effective mechanical and biological filtrati`on. The fine filter fleece also filters any remaining cloudiness and ensures crystal clear water.

Economical and energy saving
It has a relatively low wattage considering its functionality. Making it quite economical and energy saving. Its quiet operation means it runs effectively without and disturbing noises. 

50 100 200
Aquarium Volume 50 L 100 L 200 L
Flow Rate 350 L/H 500 L/H 650 L/H
Power 5 W 6 W 7 W
Product Dimensions 12 x 11 x 21 cm 12 x 11 x 27 cm 12 x 11 x 33 cm
Included Heater HeatUp 50 W HeatUp 100 W HeatUp 200 W


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.


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