Description:
A high-performance external canister filter designed for large freshwater and tropical aquariums. The PROTEGE P4000 provides strong water circulation with a flow rate of 1,850 litres per hour and is suitable for aquariums up to 370 litres. With an integrated UV steriliser, customisable media baskets and a quiet, low-vibration motor, it provides powerful multi-stage filtration without taking up valuable space inside the aquarium.
The external canister design keeps the main filtration system outside the aquarium, providing plenty of room for filter media while leaving the tank itself less cluttered. Water is drawn from the aquarium, passed through multiple stages of filtration and returned to the tank, helping remove suspended waste, support beneficial bacteria and maintain good water circulation.
Three easy-access media baskets allow you to customise the filtration according to your aquarium's needs. Use a combination of mechanical, biological and chemical media, including sponge, filter wool, ceramic rings, bio balls and activated carbon. The stackable basket design makes maintenance more straightforward, allowing individual baskets to be removed, rinsed or replaced without having to disturb the entire filtration system.
The integrated UV steriliser provides an additional stage of water treatment by exposing water passing through the UV chamber to ultraviolet light. This can help control free-floating algae and microorganisms in the water column, making it useful for aquariums where maintaining clear water is a priority. UV filtration works alongside the filter's mechanical and biological stages rather than replacing them.
Maintenance is made easier with quick-connect hose fittings and release valves, allowing the filter to be disconnected for cleaning and servicing. The primer button helps simplify setup and restarting the filter after maintenance, while the quiet motor and low-vibration design make it suitable for indoor aquarium setups where minimising equipment noise is important.
With its combination of strong water flow, customisable filtration and integrated UV treatment, the PROTEGE P4000 is a practical option for aquarists looking for a high-capacity external filter for larger aquarium setups.
Suitable for freshwater, tropical and saltwater aquariums up to 370 litres.
Product Features:
- Effectively filters very large tanks, ensuring optimal water clarity and circulation
- Supports a variety of filter media including mechanical, biological, and chemical options for a customised and thorough filtration process
- UV-C light kills algae blooms, disease and bacteria to it helps keep your aquatic pets and plants healthy
- Simplifies maintenance by allowing you to remove, rinse or replace individual baskets without disturbing the whole system. Ideal for using ceramic rings, filter wool, activated carbon, and more
- Engineered for minimal vibration and noise, making it suitable for indoor setups where peace and quiet matter
- Prevents leaks and makes disconnecting hoses for cleaning quick and easy with its strong sealing and quick release valves
- Safe for sensitive fish and plants, with good water circulation that supports plant health and fish well-being
- Made with quality materials to ensure long-lasting performance under continuous operation
Product Specifications:
- Flow Rate: 1,850 Litres per hour
- Tank Capacity: Suitable for tanks of up to 370L
- Frequency: 50Hz
- Input: 240v AC
- Power: 40W
- Head-Max output: 1.4m
- Power Plug: Australian Standard
- Power cable length: 1.6m
- Bio ball capacity: 30-40
- Product Size: 265 x 265 x 430mm (L x W x H)
- Carton Size: 34.5 x 28 x 43.5 cm (L x W x H)
- Carton Weight: 8kg
Hose Specifications:
- Internal diameter: 19mm
- External diameter: 25mm
- Length: 1.8m (x2)
*This Product is backed by a 1 Year Warranty
Items Included:
- 1x Protégé External Filter and Pump Canister
- 3x Filtration Baskets
- 2x Piping
- 1x Connecters & Tubing kit
- 1x Mechanical/Biological/Chemical Filter Media Kit
- 1x Owner's Manual
PROTEGE P4000 External Canister Filter with UV Steriliser - 1850L/H
PROTEGE P4000 External Canister Filter with UV Steriliser - 1850L/H
Low stock: 10 left
Everything about shipping, specifications and warranties is just below.
Why Shop With Us — Our Guarantee & Shipping Info
Why Shop With Us — Our Guarantee & Shipping Info
✅ Quality Products - Reliable aquarium supplies for your setup.
🚚 Standard Shipping Up to 10 kg ($11.95 to $24.95): Delivery within 3 to 10 business days. Rates by order weight: up to 1.5 kg $11.95; 1.5 - 2.5 kg $14.95; 2.5 - 4 kg $16.95; over 4 - 7 kg $19.95; 7 - 10 kg $24.95.
🚚 Heavy & Bulk Shipping Over 10 kg ($34.95 to $59.95): Delivery within 3 to 10 business days. Rates by order weight: 10 - 15 kg $34.95; 15 - 20 kg $44.95; over 20 kg $59.95.
Shipping is calculated at checkout based on the combined weight of dry goods in your order.
🛡️ Warranty Support - Most eligible equipment and accessories are backed by a 1-year manufacturer warranty, with claims handled through us.
🔄 Easy Returns - Most unopened dry goods can be returned within 14 days for change of mind, subject to our return conditions.
🤝 Trusted Couriers - Reliable delivery at a great rate.
💬 Expert Support - Got Questions? Chat with us anytime for advice!
🐟 Adding fish to your order? - Fish, Food and Plants ship separately from our dry goods collections with our Live Arrival Guarantee. When ordering from both our dry goods and fish/food/plant collections, both shipping fees will apply (example: $30 fish & food + $11.95 dry goods = $41.95 total).
👉 For more details visit our Shipping page.
Tips Before You Buy — Product Guidance
Tips Before You Buy — Product Guidance
💡 Unsure which product is right for your tank? Visit our Education section or Blogs for help choosing the best equipment.
🐟 Beginners can start with: How to set up your aquarium, while everyone can check out Aquarium Maintenance & Care for ongoing tank tips!
🌿 Not all products are suitable for every tank size - Double-check dimensions and specifications before purchasing.
✍️ If you’re stuck: Reach out through our chat, we’re always happy to help!
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A solid all-rounder for larger tanks that want the peace of mind of UV sterilisation alongside flexible multi-stage filtration. The three media baskets give you real control over your filtration setup, and the UV does the work that most filters at this size simply don't offer.
As a general rule, give your canister a clean out every 1 to 3 months, though how often you actually need to depends on how stocked your tank is, whether you have plants, and how much waste your fish produce. A good rule of thumb is to simply run it until you notice the flow starting to drop, then give it a thorough clean.
When cleaning, always rinse your sponges and biological media in a bucket of old tank water siphoned during a water change, never under tap water. Chlorine and chloramines in tap water can kill the beneficial bacteria living in your media, which can cause an ammonia spike and stress or harm your fish.
Frequently Asked Questions
How do I choose the right PROTEGE canister filter?
Choose the model based on your aquarium size, required flow rate and available space for the filter. The range includes the P2000 at 1,250L/H for aquariums up to 250 litres, the P4000 at 1,850L/H for aquariums up to 370 litres, and the Ultra Series at 2,400L/H for aquariums up to 480 litres.
What is the difference between the PROTEGE P2000, P4000 and Ultra Series?
The main differences are flow rate, recommended aquarium size, power consumption and whether the model includes an integrated UV steriliser. The P2000 runs at 1,250L/H and is suitable for up to 250 litres, the P4000 runs at 1,850L/H and is suitable for up to 370 litres, while the Ultra Series runs at 2,400L/H and is suitable for up to 480 litres. The P4000 and Ultra Series include an integrated UV steriliser, while the P2000 does not.
What type of filter media can I use?
The canister filters can accommodate mechanical, biological and chemical media. Suitable options include filter sponges, filter wool, ceramic rings, bio balls and activated carbon. The media arrangement can be customised to suit your aquarium and filtration needs.
Can I use filter media bags in these canister filters?
Yes. Loose media such as ceramic rings, bio balls or activated carbon can be placed into suitable filter media mesh bags to keep each type contained and make maintenance easier. Make sure the bags are positioned so they do not restrict water flow through the filter.
Which PROTEGE models have a UV steriliser?
The P4000 and Ultra Series include an integrated UV steriliser. The P2000 does not include UV filtration.
What does the UV steriliser do?
The UV steriliser exposes passing water to ultraviolet light, which can help control free-floating algae and some waterborne microorganisms. It works alongside the mechanical and biological filtration rather than replacing either stage.
How easy are these canister filters to maintain?
The stackable media baskets can be removed individually, allowing you to rinse or replace filter media without having to dismantle the entire filter. Quick-connect hose fittings and release valves also make it easier to disconnect the filter for cleaning and maintenance.
What is the primer button used for?
The primer button helps fill the canister with water and makes starting or restarting the filter easier after installation or maintenance.
Are these canister filters quiet?
The PROTEGE range features quiet motors and low-vibration designs intended for indoor aquarium setups. The amount of noise you hear will also depend on the surface the filter is placed on and the surrounding environment.
Can these canister filters be used in freshwater and saltwater?
Yes. The PROTEGE canister filter range is suitable for freshwater, tropical and saltwater aquariums. Choose the appropriate model based on your aquarium size and filtration requirements.
Read our beginner's guide to aquarium filtration to find the right fit.
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