Many aquarists indeed discover that their aquarium works just as well without its filter.
Decoding a new practice, why and how does it work?
More and more enthusiasts are rediscovering a simpler aquarium hobby by doing without a filter.
The first reactions, reluctantly, were to concede that it could work provided there are very few fish.
But, once again, the experience showed the opposite.
Especially since some had already taken the plunge and also removed the filter from their aquarium... without any unfortunate consequences!
A mechanical function and a biological function are attributed to aquarium filters.
In the absence of a filter, the first function is no longer guaranteed, but the biological function is perfectly ensured without a filter.
It doesn't need one at all.
Like in nature, the entire aquatic environment is a very rich microbiome, and bacteria populate it by the billions, both in the water and on the walls, plants, soil...
These bacteria ensure all biological cycles, including the famous nitrogen cycle.
With or without a filter, the amount of nitrates in an aquarium is exactly the same.
Only plants can make them disappear by consuming them.
To do without a filter, it is therefore enough to allow a maximum microbial diversity to settle.
There is no doubt that we are on the verge of important discoveries regarding this aquatic microbiota, about which research is still in its infancy.
Extreme cleanliness is the enemy of the aquarium!
The other advantage of doing without a filter is that it eliminates the current and the suction that can disturb certain species.
A filter would then suck up your ostracods, your daphnia, your Blackworm, and sometimes even the water lice that are, after all, the main interest of these highly sought-after and tranquil meditation aquariums.
The old under sand filters, connected to a simple small air pump and which created an imperceptible current by just passing water through the substrate, already utilized this ability of the aquarium to use its own microbiome to stay healthy!
Then came the era of technology at all costs.
Sometimes to the absurd...