Filtration in an aquarium – which filter to choose and how it works (guide)
Filtration is the absolute basis of every aquarium. Without it, there is no stable environment for fish, and even the nicest tank quickly turns into a problem.
If you are just starting out, be sure to first see how to set up an aquarium step by step:
https://spotmeup.pl/blog/zwierzeta-20/jak-załozyc-ozdobne-akwarium-słodkowodne-507
How does an aquarium filter work?
The filter is responsible for 3 key processes:
- mechanical cleaning (removal of impurities)
- biological (bacteria break down ammonia)
- chemical (optional – e.g. activated carbon)
It is the filter bacteria that decide whether the fish will survive.
Types of filters
Internal filter
- tani
- simple
- good for small aquariums
External filter (canister)
- much more efficient
- better for larger tanks
- less visible
Cascade filter
- compromise between price and performance
Which filter should I choose?
Principle:
the filter should filter 3-5x the volume of the aquarium per hour
E.g. 100l aquarium → 300–500l/h filter
The most common mistakes
- turning off the filter at night
- filter too weak
- washing the cartridges in tap water (kills bacteria!)
If you don't have an aquarium yet, start with the basics:
https://spotmeup.pl/blog/zwierzeta-20/jak-załozyc-ozdobne-akwarium-słodkowodne-507
The selection of fish is also important for filtration - check the atlas:
https://spotmeup.pl/blog/zwierzeta-20/atlas-ryb-słodkowodnych-akwariowych-510
