How do you maintain your aquarium filter?

Your filter is the heart of your aquarium. And just as your own heart deserves some love every now and then (nothing wrong with a little "chest rub," right?), your filter deserves attention too. A clogged filter is like a cold: everything runs sluggishly, and nobody likes it. In this guide, you'll learn how, when, and why to clean—without killing your beneficial bacteria.

Clean your filter when flow decreases or it becomes visibly dirty . Sponge filters: approximately monthly. Hob/canister: every 3–6 months. Always rinse in aquarium water (never tap water) and do not use soap. Replace consumables such as filter floss regularly.

Why do you need to clean the filter?

Your filter is both a garbage disposal and a bacteria haven. It catches leftover food, plant matter, and fish waste. If these things remain for too long, the flow rate drops and your water quality can deteriorate. The goal of cleaning: remove dirt and preserve bacteria .

Natural helpers: fill your tank with fast-growing plants from the plant collection , mosses , and floating plants like Salvinia , Limnobium, or Elodea densa . Want extra biofilm and tannins? Use botanicals and a catappa leaf .

When to clean?

• Sponge filter: Approximately monthly or as soon as flow decreases. ( See sponge/air filters .)
• Hang-on-back: every 3–6 weeks, depending on occupancy and food.
• Canister filter: every 1–4 months; longer for many plants/floating plants.

Step-by-step cleaning

1. Preparation: Fill a bucket with aquarium water (rinse bath).
2. Turn off: unplug the power cord, disconnect the filter. No time or inclination? Schedule our aquarium service »
3. Gently rinse the media (sponge/ceramic/bioballs) in the bucket. Never rinse under the tap.
4. Replace filter wool when it becomes clogged: universal filter wool .
5. Rinse the housing briefly with aquarium water (no soap!).
6. Rebuilding & bleeding . Tip: check your intakes/exhausts and hoses while you're at it.

Quick comparison: filter type & maintenance

Filter type	Frequency	Notes
Sponge filter	± monthly	Squeeze under water ; preserve bacteria
Hang-on-back (HOB)	3–6 weeks	Monitor flow; replace cotton wool in time
Canister	1–4 months	Depending on bioload and plant growth

Troubleshooting

• Filter won't start: check and bleed the rotor/shaft chamber. Need help? We'll fix it for you .
• Flow remains low: Clean the inlet/hoses, do not block the media. Replace the filter wadding .
• Algae spike after cleaning: too thorough. Add fast-growing plants from the plant collection or additional floating plants .
• Rattling/buzzing noise: air in the rotor; tilt it to bleed it. Need a new set? Check filters .

Extra handy: scape slim for better flow

Visibility barriers and hiding places help direct debris toward the inlet (and fish find it relaxing). Combine natural wood like mangrove or spiderwood with stone like Dragon Stone , Slate , or Mini Landscape . A nutrient-rich soil/substrate helps keep plants healthy—less clutter, more stability.

Useful links

• All filters & filter media
• Universal filter wool
• Aquarium plants
• Mosses
• Floating plants – Salvinia / Limnobium / Elodea
• Botanicals – Catappa Leaf
• Wood (hardscape) – Mangrove / Spiderwood
• Stones (hardscape) – Dragon Stone / Slate / Mini Landscape
• Soil & substrate
• Anubias nana (easy)
• Aquascape tools (tweezers/scissors)
• Aquarium service & project realization
• Contact & service request

Conclusion

A clean filter = clear water and happy fish. Clean smartly (remove dirt, let bacteria thrive), scape logically for better flow, and use plants as cleaning aids. Not sure or want to outsource? Schedule service or project implementation —you say "splash," I'll take care of the rest. 😄