Proper maintenance of your aquarium filter is essential for keeping your tank healthy. Filters rely on several components—impellers, O-rings, UV bulbs, and filter foams—to function efficiently. Knowing when to replace each part can prevent damage and maintain optimal water quality.

Impellers
Impellers generate the suction that pulls water through your filter. While durable with regular maintenance, they are delicate and can wear out over time.

Signs an Impeller Needs Replacing:

  • Cracked or missing blades

  • Excessive noise, such as grinding or rattling

  • Reduced water flow despite cleaning and priming

  • Frequent jamming or difficulty turning by hand

Maintenance Tips:

  • Clean the impeller, housing, and magnets regularly to prevent debris buildup and friction.

  • Inspect for cracks or chips during each cleaning session.

  • Replace immediately if damaged to prevent harm to your filter motor.

O-Rings
O-rings ensure your filter is watertight. Over time, they can become dry and brittle, increasing the risk of leaks.

Maintenance Tips:

  • Check and lubricate O-rings regularly with a food-grade, non-toxic lubricant.

  • Inspect for tears, cracks, or breaks, and replace immediately if damaged.

  • Ensure replacement O-rings are compatible with your specific filter model.

UV Bulbs
UV bulbs in aquarium sterilisers reduce pathogens and algae. Without regular replacement, their effectiveness declines.

Replacement Guidelines:

  • Begin checking after 6–8 months of use.

  • Replace every 6–12 months to maintain sterilisation efficiency.

Filter Foams
Filter foams trap debris and support beneficial bacteria. Replacing them too often can disrupt the biological balance of your tank.

Replacement Guidelines:

  • Fine foams (yellow sponges): every 4–6 weeks

  • Medium/coarse foams (blue sponges): replace when pores enlarge or signs of damage appear

Replacement Tips:

  • Avoid replacing all foam at once; remove a third or half initially to preserve beneficial bacteria.

  • Rinse new foams in existing tank water before installing to allow bacteria colonisation.

  • Replace the remaining foam after 1–2 weeks for a smooth transition.

Regular inspection and timely replacement of these components will keep your aquarium filter working efficiently, maintaining a healthy, thriving aquatic environment.

If you need assistance, feel free to contact us!