This month we’ve teamed up with OASE to offer one lucky reader the chance to win a supreme bundle of coveted aquarium goodies worth over £500.

Topping the list of this outstanding package is an OASE BioMaster 600 Thermo filter, with a retail price of £311.99.

Suitable for tanks of up to 600 l, this 1250 lph external canister has a filter volume of 6.8 l and consumes just 22W of power. Furthermore, it has a built-in 300W heater, helping to keep obtrusive hardware out of your tank.

The OASE BioMaster 600 also boasts an EasyClean pre-filter chamber for extremely simple and convenient filter cleaning, perfect water quality thanks to the high filter volume consisting of Hel-X and filter sponges, a complete quick start set that includes filter media, hoses, adapters, flow regulator, suction and discharge pipe as well as water diffuser.

The combination of highly effective biological filtering with Hel-X and mechanical/biological cleaning with filter sponges is ideally coordinated to ensure healthy and clear aquarium water. On top of all that, it’s safe, with a shut-off mechanism and safety lock to prevent unwanted water leakage, such as when removing the pre-filter module.

As well as this great filter, the lucky winner will also receive:

• Carbon Prefilter foam Set 6 BioMaster — optional replacement sponges for the BioMaster with impregnated carbon
• OxyMax 400 — air pump with 2 adjustable outlets, with airstones and airline
• StreamMax Classic 2000 — Streaming pump with adjustable flow rate
• ClearTronic UVC 11 W — UVC for the aquarium; combats harmful floating bacteria and germs without affecting your filter bacteria, and removes turbidity caused by algae and bacteria
• Magnetic glass cleaner 10mm
• Digital Thermometer
• Fish net 15cm
• Spiral brush