Goldfish. How not to ruin them at the very beginning.
A dream come true! You bought yourself a goldfish, and at the same time also a "huge" aquarium, for as much as 30 liters! And now what? A small aquarium with a fish or a large one with several? There is no way to change the aquarium to "bigger", then the best option is other fish. Are there few of them? Remember that keeping goldfish in such an aquarium is a torment for yourself and for them. Other fish will feel much more comfortable in a "jar". But if you are still true to your dream of precisely goldfish, then purchase a large aquarium.
The habitat of fish in such a "conclusion" is a continuous meal. Take a closer look at the fish, the upper fin pressed to the body, this is clear evidence of this.
A small aquarium and goldfish is one of the most common problems of a novice fauna lover. Is it possible or impossible to keep goldfish in aquariums that contain no more than 30 liters of water? Of course, in practice this is possible, but any watercolorist will be against such an undertaking.
If there is no way to distribute goldfish to friends and acquaintances, there is no financial opportunity, or even a commonplace “no place”, let's look at some recommendations. Many have already purchased a mini-aquarium and settled in 3 fish in it, they say that the fish feel normal. But in practice, constant problems arise almost daily. Soon, in most cases this leads to the death in the throes of their pets. To survive in small aquariums of goldfish, but this requires constant care and requires loss of time. And survival in such conditions is more likely an exception. Suppose you can maintain a favorable atmosphere in an aquarium, but aren’t there any cases when it is required for some reason to go away indefinitely? Will your household or friends be able to do the necessary procedures on their own? And what will be your feelings on returning? ..
When keeping fish in small aquariums, they are at risk, which are susceptible to various diseases, much more often than in larger ones. Large in their natural structure, they feel "squeezed." Of course, you can’t say that they will be sick, but they have much more chances to get sick than smaller fish in the same conditions. And I would also like to note that the life expectancy of goldfish in living small aquariums is less than the average period.
What can be done to make it easier for your pets to live. This is of course a very frequent replacement of water, at least 30% of the total. It is better to do this every day, but at least every two days. Do not overfeed. Do not feed too much monotonous food.
But still, either gold in a large, or other fish in a small aquarium.