Bubble Magus Automatic Roll Filter ARF-S G2
£124.99
Freshwater Filtration
Discover high-performance freshwater filtration systems at Charterhouse Aquatics. From internal and external filters to sponge and bio-media options, find top brands like Fluval, Eheim, and Oase. Ensure crystal-clear water, optimal biological balance, and a healthy aquarium environment.
Freshwater Aquarium Filtration Explained
A Complete Guide
Eheim Aquaball Upgrade Kit
£12.99
D-D Advanced ATO
£99.99
Replacement UV-C Lamp for Eheim ReeflexUV 800 - 2 Pin
£29.99
Juwel Cirax L
£13.95
Eheim Wide Jet Pipe 12mm
£10.09
Hugo Kamishi Nitrate/Nitrite Filter Pad
£5.99
Fluval UVC In-Line Clarifier
£71.99£94.99
Red Sea Reef Spec Carbon
£7.49
Fluval U3 Underwater Internal Filter
£60.49£79.99
Eheim MECHpro - 1ltr (Mechanical Filtration)
£12.49
Eheim Cleaning Brush 12mm
£10.70
Eheim Single Tap Connector 9mm
£6.95
Hugo Kamishi Carbon Filter Pad
£4.49
Juwel BioPad S
£2.85
Eheim Classic 600 Coarse Filter Pad (Blue) (x2)
£14.09
Replacement UV-C Lamp for Eheim ReeflexUV 350 - 2 Pin
£22.65
Hugo Kamishi Phosphate Filter Pad
£4.99
UNS Dual AOI Intake Guard
£6.95
Eheim MECHpro - 2ltr (Mechanical Filtration)
£20.49
Replacement UV-C Lamp for Eheim ReeflexUV 500 - 2 Pin
£24.95
Eheim Reducing Piece 12-9mm
£4.45
ClariSea XL Fleece for SK5000 - 6 Pack
£107.61£119.94
Eheim Elbow Connector 19mm
£4.28
Have Questions About Freshwater Filtration?
We have answers. Get quick help for common questions.
What type of filter is best for a freshwater aquarium?
The best filter for your freshwater tank depends on its size, stock level, and setup style. External canister filters are ideal for medium to large tanks due to their strong flow and multi-stage filtration. Internal filters are great for small to mid-size aquariums and are easy to install. Sponge filters are perfect for breeding tanks or shrimp tanks, offering gentle biological filtration.
What are the different types of filtration in freshwater aquariums?
There are three main types of filtration: mechanical filtration removes physical debris like uneaten food and plant matter; biological filtration supports beneficial bacteria that break down toxic ammonia and nitrite; and chemical filtration uses media like activated carbon to remove odors, discoloration, and dissolved impurities.
How do I choose the right size filter for my tank?
Look for a filter rated for at least 3 to 5 times your tank’s volume per hour. For example, a 100-litre tank would need a filter with a minimum flow rate of 300 to 500 LPH. Overstocked or heavily planted tanks may benefit from more powerful filtration.
Are sponge filters enough for a freshwater tank?
Sponge filters are effective for smaller tanks, breeding setups, or tanks with delicate species like fry or shrimp. They offer gentle water flow and excellent biological filtration but may not be sufficient for heavily stocked or large tanks.
How often should I clean my freshwater aquarium filter?
In general, filters should be cleaned every 2 to 4 weeks, depending on the bio-load of your tank. Over-cleaning or using tap water can disrupt beneficial bacteria colonies, so it’s best to rinse filter media in old tank water to preserve biological filtration.
Do I need a filter in a planted or low-stock tank?
Yes. Even in planted or lightly stocked tanks, filtration is essential for maintaining water circulation, supporting bacterial colonies, and removing waste. However, flow strength may need to be reduced to avoid disturbing plants or slow-moving species.
Can I mix different types of filter media?
Absolutely. Many advanced aquarists customize their filtration by mixing sponge for mechanical filtration, ceramic rings or bio media for biological filtration, and carbon or resin for chemical filtration. This creates a more efficient and balanced filtration system.
What maintenance does a canister filter require?
Canister filters should be checked monthly and thoroughly cleaned every one to two months. This involves rinsing or replacing media, cleaning impellers, and ensuring all hoses and connections are free of clogs and debris.
Explore the Best in Freshwater Filtration at Charterhouse Aquatics
At Charterhouse Aquatics, we stock a wide range of freshwater filtration systems designed to keep your aquarium water clean, clear, and healthy. Whether you’re setting up a small nano tank or maintaining a large planted aquarium, the right filtration system is essential for removing waste, balancing water parameters, and supporting beneficial bacteria.
Choose from trusted brands such as Fluval, Eheim, Oase, and Tetra, offering everything from powerful external canister filters to space-saving internal filters, air-driven sponge filters, and customizable media packs. Our selection caters to all experience levels—from beginners to aquascaping pros—ensuring your freshwater setup runs smoothly and efficiently.
Need advice on choosing the right filter? Our expert team is here to help. Enjoy fast UK shipping, competitive pricing, and top-tier customer service every time you shop with us. Keep your aquatic world thriving with freshwater filtration solutions from Charterhouse Aquatics.
