If you need to give an example of popular opinion, you can give a judgment about the need for a hungry day, as the unconditional law of proper feeding of aquarium fish.
The source of the advice of professional aquarists to newcomers about the introduction of a hungry day is the conviction that a novice aquarist will definitely overfeed his pets, therefore it is rational to stop organic stuffing into the aquarium water for at least a day.
From the point of view of the normalization of the hydrochemical composition of aquarium water, this does not prove its usefulness in practice. On the contrary, the accumulation of phosphates and nitrates will continue with no less speed, the oxidizability of water will continue to increase rapidly.
The main postulate claiming the need to introduce a hungry day. an indication of cold-blooded representatives of the class of fish. Allegedly, this feature causes the need for smaller amounts of energy and therefore it will be useful for aquarium fish, it will give an opportunity to get rid of slags.
First, slags are wastes from metallurgical processes, and not “waste” physiological processes, each of which has its own name and is removed from the body naturally, which is not affected by hunger, but by the state of the systems responsible for such processes.
Secondly, personally, I have not seen a single fish, perched in the lotus position and flew away to nirvana. Probably, the fish do not resort to such practices and do not refuse in natural conditions once a week from food. They do not know about their cold blood and that they need less energy. Therefore, they rampantly spend this energy, obtained from food, on the course of biochemical cycles that provide energy for the synthesis of cells of the immune system, respiration, movement the list is endless.
In fact, a hungry day is not only the most powerful negative stress, when the inhabitants of the aquarium suddenly encounter the complete absence of previously regularly arriving food.
Many aquarium fish that have a long intestine and a mixed type of food, consuming food throughout the daylight hours, are strictly contraindicated. These fish for the normal functioning of the body, requires a uniform filling of the intestine along its entire length.
Among the species for which the answer to the question "How much can you not feed aquarium fish?". will be "not at all". such as:
– all kinds of barbs;
– labyrinths (hungry days are especially harmful for lalius);
– viviparous fish (especially breeding species);
– neons (these fish naturally consume a small amount of feed, which must be taken into account when feeding them)
Hunger days are also harmful to active fish, and therefore needing a lot of energy from food. For example, Malawian cichlids, cichlids from Lake Tanganyika.
Hungry days for Cichl are one of the reasons for the weakening of the body’s resistance to hexamitosis. A hungry day for an angelfish. provoking the disease mycobacteriosis. In addition, if we talk about scalars. if such fish are kept with neons or other small species, then in hungry days they start trying to catch smaller neighbors. If this succeeds, the hunt will continue in the days of abundant feeding.
Instead of a hungry day, apply fasting day, when the ration of feeding is built on the basis of granules with a high content of vegetable components, especially spirulina.
If on the unloading day it is not possible to give your fish such industrially made pellets that can be purchased at aquaMegaMall.ru, you can give a little independently prepared feed for herbivorous cichlids. Formulations of such feed. in the appropriate article.
For goldfish on a fasting day, prepare a diet of plant foods. Labyrinth offer semolina.
How to prepare these feed will be discussed in other specialized articles.
Regarding algae, as well as loricarial catfish which are fed tableted bottom food. Do not forget that their main task in aquariums is not only aesthetics. But the fight with fouling. As a rule, in any aquarium there is enough algae to feed, and if they are already destroyed, when it is possible to issue "dopp". The aquarist himself must determine the need for it on the basis of observations. If the fouling is not enough. the fish will start to lose weight, they will become unusually active. Sub-feed is given not daily, but every other day.
Many aquarists engaged in breeding fish and, therefore, sensitive to the health of producers, give low protein feeds on a fasting day, and many do not have fasting days at all, including such feeds in the daily ration of pets and giving them once a day.
Photo 1. Initial and final stages of obesity caused by overfeeding
Changes in the nature of the diet are used if obesity symptoms are observed as a result of overfeeding was allowed and then the discharge day is turned into days, giving low-protein vegetable food first every other day, and when the fish get used daily until the symptoms disappear.
Regarding predatory fish (piranha, haracin pikes) that weed aquarium fish receive as food, the structure of their gastrointestinal tract and physiological characteristics of the body allow for an incontinent fasting without affecting health. Therefore, for these types of introduction of one hungry day a week can be applied.
About the importance of the right combination of proteins, fats, carbohydrates, vitamins and various elements, how many times a day, what and how to feed the fish in the aquarium. in the following articles: