The question of how often it is necessary to change the water in the aquarium is relevant not only for beginners, but for seasoned fish breeders. After all, in its formation, the aquarium ecosystem passes through different stages, and the state of water greatly influences the maintenance of the balance.
When do I need to change the water in the aquarium?
Most experts in breeding aquarium fish agree that on average it is necessary to change 20% of the water contained in the aquarium, once every two weeks. This will give sufficient renewal to the water layer, but, at the same time, will not be detrimental to the ecosystem formed in the aquarium.
More progressive experts recommend that when replacing water, you should orient yourself on the life cycle of the aquarium. At the same time, how often it is necessary to change the water in the aquarium is calculated from the moment of launch, that is, filling the tank with water. So, in a new aquarium (from 0 to 3 months) it is generally not recommended to change the water. Especially it concerns the question of how often to change the water in a small aquarium, where the ecosystem is more susceptible to all impacts. In a young aquarium (3 to 6 months), 20% of water changes every two weeks or 10% every week. In a mature aquarium (from 6 to 12 months), 20% of water is replaced once a month. In the old same aquarium (more than 1 year) with the formed environment, it is necessary to change 20% of water every 2 weeks for the first two months, and then switch to the regime of a mature aquarium.
When you need to completely change the water in the aquarium?
A complete change of water in the aquarium destroys the formed ecological ties. It is necessary to start the aquarium in a new way. Therefore, the complete replacement of water is only subject to very serious circumstances: turbulent flowering of water, constant turbidity due to the multiplication of microorganisms, and also if parasites or pathogens were introduced with water.