Fluval FX4 External Filter

Building off the high-performance FX platform, the all-new FX4 canister filter bridges the gap between the Fluval 406 and the FX6 canister filters, making it an ideal choice for aquariums up to 250 US Gal (1000 L).

• Multi-stage filter pumps out 700 gallons (2650L) of water per hour
• Smart Pump - advanced microchip technology continuously monitors and optimizes pump performance
• Self-starting - just add water, plug in and Smart Pump will take over. Trapped air auto-evacuated every 12 hours to ensure maximum efficiency
• Easy water changes eliminate need to lift heavy buckets. Simply attach hosing to output (Kit sold separately) and Smart Pump does the rest
• Removable, stackable media baskets eliminate water bypass and hold a total of 1 gallon (3.9 L) of media
• All filter media included - mechanical, chemical and biological
• Aqua-Stop valves with leak-proof Click-Fit attachment system
• Valves positioned at convenient 45-degree angle for easy installation and rotation
• Anti-clog, telescopic strainer ensures continuous water flow
• Multi-Directional Output nozzles can be fully adjusted to create customized water flows
• Utility Valve with drain hose for easy maintenance and flushing of canister
• Rubberized feet help ensure quiet operation
• Compact 16.5' tall design - easily fits under most aquariums
• Made in Italy
• For use in freshwater and saltwater aquariums

Standard Delivery

Standard delivery is on those items that can be delivered by one person, and costs £5.95. This is free if you spend £60 or more. Delivery will take between 2 - 3  working days for in-stock items, and your item will be delivered by either DPD or Fedex. If you have any special delivery instructions, these can be left as notes during the checkout process. 

Please be aware that we do not offer free returns, so unless there is a fault with your item, then you will be required to cover the cost of returning it to us, or for us to collect the item.

Click & Collect In-Store

Click and Collect is free, and is available on most of our non-furniture items, although please note that some exceptions do apply. If the product qualifies, then the option will be offered during the checkout, after you have entered your billing details. 

If you would like to collect from our Boston store, or collect furniture, then please do not hesitate to contact us and we will do our best to arrange this.

Next Day Delivery

Next working day delivery is available on selected items, that can be delivered by one person. The charge is £7.95. If the product qualifies for next day delivery, then the option will be available during the checkout process, and the order must be placed before 14:00 Monday - Friday.