Description
21mm Bio Balls Aquarium & Pond Filter Media
Premium Bio Balls - Standard 21mm
Filter media forms an essential part of any aquarium or pond filtration system. Our 21mm Bio Balls provide a large surface area for bacteria to develop, helping to break down ammonia and nitrite.
Bio Balls also help improve overall water quality by maintaining healthy oxygen and PH levels, and absorbing and breaking down poisonous ions.
Long lasting and highly effective, our Bio Balls are suitable for use in filtration systems to filter freshwater tropical and saltwater marine fish tanks and ponds.
Supplied loose as pictured. Please select desired quantity from dropdown.
Diameter: 21mm / 2.5cm
Maintenance: Rinse thoroughly prior to use until the water runs clear. Bio balls can be rinsed and re-used numerous times. To preserve biological activity, it is advised to use aquarium water when cleaning rather than tap water.
In stock orders placed before 2pm will be despatched on the same working day (not including palletised items, pond plants or fibreglass ponds).
Pre-orders are shipped once we have the stock available and will be shipped using the service chosen at checkout.
All services are working day services and do not include delivery on Saturdays and Sundays or public holidays as standard. Deliveries are usually Monday to Friday only, although some Royal Mail items may be delivered on weekends as standard if the service is available in your area.
| SERVICE | SPEND | COST |
| Packet/Courier items | ||
| Royal Mail (2-3 days) | £0.00-£49.99 | £2.99 |
| Royal Mail Next Day (1-2 days) | £0.00-£49.99 | £4.99 |
| Parcelforce 24 (1 day) | £0.00-£49.99 | £7.99 |
| Parcelforce 24 (1 day) | £50 and up | FREE |
| Pallets (booked in) | aquariums / bulky items | |
|
Pallets Standard (3-5 days) |
- | FREE |
|
Pallets Express (1-2 days) |
- | £39.99 |
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| *EXCLUDED ITEMS | extra delivery fees apply: | |
| Fibreglass Ponds (booked in) | ||
|
Zone 1 (7-10 days) |
- | £79.99 |
| Zone 2 (7-14 days) | - | £149.99 |
| Zone 3 (7-21 days) | - | £249.99 |
| Pond Plants (direct from grower) |
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| All pond plants (3-10 days) | one-off fee regardless of order size/value | £5.99 |
Please see our full delivery information page and terms and conditions for detailed information on shipping policies and zones