Description:
A reliable external canister filter for small to medium aquariums, the Giantz 1250L/H External Canister Filter delivers 1,250 litres per hour at just 14 watts, making it an energy-efficient option for a filter running continuously around the clock. Suited to aquariums up to 250 litres, it brings proper multi-stage external canister filtration to mid-sized freshwater and saltwater setups at an accessible price point.
External canister filters work by drawing water from the tank through an inlet, passing it through sealed, pressurised media baskets, and then returning filtered water through an outlet. The canister sits outside the tank entirely, keeping your aquascape clean and uncluttered.
This model features four-stage filtration with easy-access media baskets for a customisable filtration stack, quick-connect hose fittings for straightforward setup, and a tight cap lock to prevent leaks during operation. A maximum head height of 1.3 metres covers most standard setups where the canister sits below or beside the tank. Built for long-term reliability in both freshwater and saltwater environments.
Suitable for freshwater and saltwater aquariums up to 250 litres.
Product Features:
- Efficient external filter with up to 1250L/h flow rate
- Suits both freshwater and saltwater aquariums
- Suitable for aquarium tanks of up to 250 litres
- Ultra-fine 4-stage filtering basket
- Low power consumption
- Tight cap lock to prevent leakage
- Complete set of accessories including a pump, hoses and pipes
- Easy-install inlet and outlet connectors with flow control switch
Product Specifications:
- Voltage: 240V/50Hz
- Power: 14W
- Maximum height: 1.3m
- Flow rate: Up to 1250L/h
- Inlet size: 12mm
- Outlet size: 16mm
- Hose sizes: 1 x 1.2cm x 154cm and 1 x 1.5cm x 180cm
- Overall dimensions: 18.5cm x 18.5cm x 37cm
*This Product is backed by a 1 Year Warranty
Items Included:
- 1x External Filter
- 2x Hose
- 1x Pipe Set Pack
*Filter media not included
Giantz External Canister Filter - 1250L/H
Giantz External Canister Filter - 1250L/H
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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How the Giantz External Canister Filter Compares
⚙️ Giantz External Canister Filter
- 🧺Multi-Stage Filtration: Uses multiple filter stages and media baskets to separate different stages of mechanical and biological filtration within the canister.
- 📦More Media Capacity: The external canister design provides dedicated space for multiple types of filter media, allowing you to build a filtration setup around your aquarium's needs.
- 🌿Keeps Equipment Outside the Tank: The filter body sits outside the aquarium, leaving more of the display area available for fish, plants and aquascaping.
- 🔧Customisable Media Setup: Accessible media baskets make it easier to choose, arrange and maintain different types of filtration media.
- 💧Higher-Capacity Filtration Options: The range includes models from 1,250L/h up to 2,400L/h, giving you options for smaller, medium and larger aquariums.
⚪ Basic Internal or HOB Filter
- 📦Smaller Media Capacity: Internal and hang-on-back filters generally have less physical space available for larger quantities or multiple types of filter media.
- 🧺Less Room to Build a Media Stack: Smaller filter compartments can limit how much mechanical and biological media you can use together.
- 🌿Equipment Takes Up Tank-Space: Internal filters sit inside the aquarium, using some of the available space within the display.
- 🔧Less Media Flexibility: Compact filter designs can leave less room to customise the type and quantity of media used.
- 💧More Limited for High-Capacity Setups: Smaller filter designs may not provide the same combination of filtration capacity and external media space available from a larger canister system.
A straightforward, no-frills external canister for aquarists who want proper multi-stage filtration without the added cost of UV sterilisation. At 14 watts for 1,250L/H, the running costs are minimal, and the four-stage filtration gives you real flexibility over your media setup.
As a general rule, clean your canister every 1 to 3 months depending on your fish load and how heavily planted your tank is. A good indicator is flow rate, when you notice it dropping, it's time for a clean. Always rinse sponges and biological media in a bucket of old tank water taken during a water change, never under tap water. Chlorine in tap water kills the beneficial bacteria living in your media, which can cause an ammonia spike and harm your fish.
Frequently Asked Questions
How do I choose the right Giantz canister filter?
Choose the model based on your aquarium size, required flow rate and the available space for the filter. The range includes a 1,250L/H model suitable for aquariums up to 250 litres, a 1,850L/H model suitable for up to 350 litres, and a 2,400L/H model suitable for up to 500 litres. Actual flow will vary depending on head height, hose length, fittings and other system restrictions.
What is an external canister filter?
An external canister filter sits outside the aquarium and draws water through an inlet, passes it through multiple layers of filter media inside the sealed canister, then returns filtered water to the tank through an outlet. This keeps most of the filtration equipment outside the aquarium and helps keep your aquascape uncluttered.
What is the difference between the three models?
The main differences are flow rate, recommended aquarium size, power consumption, head height and hose connection sizes. The 1,250L/H model is suited to aquariums up to 250 litres, the 1,850L/H model up to 350 litres, and the 2,400L/H model up to 500 litres. The 1,850L/H and 2,400L/H models also include a built-in 9W UV steriliser.
Which models have a UV steriliser?
The 1,850L/H and 2,400L/H models include a built-in 9W UV steriliser. The 1,250L/H model does not include UV.
What does the UV steriliser do?
The UV steriliser exposes passing water to UV light, which can help control free-floating algae and some waterborne microorganisms. It works alongside mechanical and biological filtration rather than replacing either one.
What type of filter media can I use?
The canister filters use multiple stages of filtration and can accommodate different types of mechanical, biological and chemical media. The 1,850L/H and 2,400L/H models include bio balls and ceramic rings to get you started, while additional media can be selected to suit your aquarium setup.
Can I use filter media bags with these canister filters?
Yes. Loose media such as bio balls, ceramic rings 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 canister.
What does the maximum head height mean?
Maximum head height refers to how high the filter can move water vertically. The 1,250L/H model has a maximum head height of 1.3 metres, the 1,850L/H model has a maximum of 2 metres, and the 2,400L/H model has a maximum of 2.5 metres. Actual flow decreases as the water needs to be lifted higher.
Can I adjust the water flow?
Yes. All three models feature flow control on the inlet and outlet connections, allowing the water flow to be adjusted to suit your aquarium and livestock.
Are these canister filters suitable for freshwater and saltwater?
Yes. All three Giantz external canister filters are suitable for both freshwater and saltwater aquarium systems.
Read our beginner's guide to aquarium filtration to find the right fit.
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