The RIO 125 LED is the smallest aquarium in the RIO range. With its compact surface area of 81 x 36 cm and classic rectangular design, the RIO 125 LED will fit perfectly into any design scheme.

Its safety base frame ensures especially safe positioning and allows you to set up your aquarium easily, with no need for special supports.

Painstaking workmanship from Germany, top-quality materials and perfectly tuned technology guarantee the very best of quality and safety, meaning a long service life for your RIO 125 LED.

Choose from black, dark wood, light wood and white.

Built in Lighting System

Brilliant luminosity and excellent plant growth are what you get with the state-of-the-art Multilux LED lighting technology from JUWEL. The replaceable DAY and NATURE LED tubes create an optimum light spectrum, while saving up to 50% of energy in comparison to T5 at the same time.

The MultiLux LED lighting system for the RIO 125 LED means that you can work on your aquarium in comfort, even when the lighting is switched on.

The ultrasound-sealed light unit is 100 percent waterproof and fulfils the stringent European safety standards.

Built in Filtration and Heater

For optimum filtering, the RIO 125 LED is fitted with a high-performance Bioflow M. This internal filter combines efficiency with safety and forms the centrepiece of any JUWEL aquarium. It works on the principle that "The water should stay in the aquarium!" and is the safest way of filtering an aquarium. The Bioflow M comes fitted with five high-performance filter media and a quiet yet powerful Eccoflow 500 circulation pump.

The 100 Watt JUWEL adjustable heater, which is perfectly embedded in the water circulation in the Bioflow M filter system, ensures the right temperature in the RIO 125 LED.

Because it uses top-quality silver contacts and shock-proof borosilicate glass, JUWEL adjustable heaters meet the highest standards in both function and safety and, as you would expect, are TÜV/GS certified.

Full Technical Details

Aquarium Specification:
- Measurements 81 x 36 x 50 cm
- Weight 25.5 kg
- Litres ca. 125 Litres


Bioflow M-Filter System (with Heater):
- Measurements 15,5 x 10,2 x 41,7 cm
- Filter Volume 3 Litres
- Filter Media Poly Pad, Carbon Sponge, Nitrax M, Sponge Fine M


100cm Multilux LED Unit:
- Product Code 85805
- Product AquaHeat 100 – Automatic-Heater 100 Watt UK
- Tasted for safety TÜV, GS
- Length 265 mm


Accessories and Consumables
Once you've established your Juwel Rio 125, we stock the entire range of accessories to keep your fish tank in tip top condition. This includes replacement and alternatively coloured T5 tubes, Hi-Flex reflectors, replacement filter media, Juwel Aqua Heat (100w for this Aquarium) and Juwel Automatic Feeders. We also keep an extensive range of spares in stock and available online.

Aquacadabra acts as credit broker/intermediary and not as a lender.

Klarna's credit products are provided by Klarna Bank AB, which is authorised and regulated by the Swedish Financial Services Authority, with limited supervision by the Financial Conduct Authority. More information can be found here.

Newpay finance options are provided through Deko’s platform by NewDay. P.D. Aquatics Ltd, t/a Aquacadabra is an Introducer Appointed Representative of Pay4Later Ltd, t/a Deko, which is authorised and regulated by the Financial Conduct Authority (ref no 728646) and is a credit broker, not a lender. NewDay Ltd is authorised and regulated by the Financial Conduct Authority (ref no 690292) and is authorised by the Financial Conduct Authority under the Payment Services Regulations 2017 for the provision of payment services (ref no 555318). More information can be found by clicking the newpay option above, or in the Newpay FAQs.

We really want you to be happy with the product that you've received. If however, when the goods arrive they're not what you want, then no problem - we have a 60 day no quibble return guarantee. Just let us know that you're going to return the item(s) by contacting us(stating your Order Number) and complete the returns packing slip that will have been included with your delivery. This will help us to quickly identify the item that you have returned (unopened and unused) - and we'll put a refund through for you.