Whether it is a fish tank or a grass tank, it is actually a semi-closed micro-ecosystem, and the so-called pests that often appear in the fish tank are mostly generated internally or introduced externally in the semi-closed ecosystem.
<h1 class = "pgc-h-arrow-right" >1, water fleas: it is not a pest</h1>
The flea in the water is a small dot, smaller than the tip of the needle, the tail is so thin that it is almost impossible to see, the following picture is the effect after magnification many times. After the flood of water fleas, the fish tank feels foggy and has a feeling of impenetrability.

In fact, the water fleas are a small crustacean belonging to the phylum arthropods, crustaceans, and phylums.
Water fleas contain a large amount of protein in the body, up to 40%-60% of their own dry weight. The protein contains all the amino acids needed for fish growth, and the carbohydrates, calcium and vitamins in the body of water fleas are also very rich.
Water fleas do not need to be removed deliberately, as long as there are fish that can be eaten quickly, if it is an ornamental shrimp breeding tank, you can put a few newborn peacocks into it, and it can be removed quickly.
<h1 class= "pgc-h-arrow-right" >2</h1>
Looking at the pictures is very scary, especially for dense phobia patients, looking at the dense, rippled insects on the wall of the tank, it is good to be able to hold back and not to vomit.
But in fact, the protein worm is a more friendly pest in the fish tank, his appearance means that your water body is too fat, may be lazy you have not changed the water for a long time, or the new into the like fish afraid that it can not eat enough to feed every day, or there are small fish born in the tank, fed egg yolk water and other things, anyway, there are too many nutrients in the water.
At this time, the first thing that needs to be done is to change the water in large quantities, for the health of the fish, it is recommended that the water should not be changed more than half at a time, generally 1/3 is more appropriate, you can change the water for many consecutive days, and gradually reduce the nutrient content of the water body.
Protein worms are generally prone to outbreaks in shrimp tanks or large fish tanks, if you can ensure that the various sizes of organisms in the tank live in harmony, you can put some hungry peacocks and other small fish, and soon you can eat clean.
If you want to cut the mess quickly, you can also fish out the fish, thoroughly clean the fish tank with brine, yellow powder or gentamicin solution, and then let the fish tank soak in brine for a while, which can generally solve the problem, but this method is not suitable for grass tanks.
<h1 class= "pgc-h-arrow-right" >3, miscellaneous snails: not much harm, look uncomfortable</h1>
In addition to ornamental snails and tool snails, other snails are considered pests, most snails are only obstructive, and only a small number of herbivorous snails are harmful to the grass tank.
In the past, we wrote an article about the various snails often encountered in the process of fish farming.
The handling of the snail is very simple, the simplest is to catch, see one catch one, catch it and smash it and throw it into the tank to feed the fish.
If you want to rely on biological control, the best way is to use killer snails, grass tanks and fish tanks are suitable, that is, patience is required, killer snails often hide and do not work. The fastest way is to put a few chocolate dolls, clean up quickly, but this guy eats shrimp, but also harasses other fish, the grass tank absolutely do not put it, otherwise please god is easy to send God.
<h1 class = "pgc-h-arrow-right" >4, planarians: very difficult pests</h1>
Planarians are 1.0-2.5cm long, often hidden during the day, and at night they will prey on small fish and shrimp and snails in sleep, which has a strong vitality and reproduces quickly, and is often hidden in the bottom sand, which is difficult to remove.
The most ideal method is biological control, the cheapest peacock fish can also remove it, but biological control requires patience and cannot be immediately effective.
There is also a physical removal method among aquarists, using a planarian trap, homemade or purchased, which can be put into the fishy food, put into the fish tank before going to bed, take it out the next morning, use it repeatedly, and it can be cleaned up in about a week.
<h1 class = "pgc-h-arrow-right" >5, Hydra: beautiful on the outside, vicious on the inside</h1>
The hydra is beautiful in shape, looks a bit like a dandelion, and is still quite beautiful when enlarged, but it is actually fatal for small fish and shrimp.
They have a basal disc at the bottom of their body, an organ used to attach to it, that secretes mucus to attach to the surface of the object. Prefer the environment of slow water flow, clean water quality, and lush aquatic grass, which often appears in the grass tank.
Hydra are relatively easy to spot and can be removed by hand with small tweezers, but because it often appears in grass tanks, lush waterweeds often become excellent refuges for them and are difficult to clean up by hand.
Fighting fish, lily fish, flower luohan, chocolate dolls and other fish can be put into the fish tank as a biological control means, because the hydra are generally attached to the tank wall or aquatic grass, will not hide in the bottom sand like planarians, so the fish can quickly eat.
<h1 class = "pgc-h-arrow-right" >6, leeches (locusts): This should be the ultimate pest</h1>
Leeches, commonly known as leeches, have been recorded in the Shennong Materia Medica and have high medicinal value. But in the fish tank, it is the most terrible pest.
Leech biological control method is difficult to work, manual removal method is very difficult and a little dangerous, the best method is the trap method, and the same as the trap method of planarians, homemade or buy traps, put in food, repeated operation until the catch is clean.
In general, the pests in the fish tank are generally caused by insufficient daily care, and if you want to avoid, one is to change the water regularly to keep the water quality of the fish tank normal; the second is that the newly entered organisms must be disinfected and quarantined to avoid bringing in harmful organisms. With these two things in place, these pests will never appear in your fish tank.