A fish tank with a length of 35 width, 20 height and 22 needs to put a filter or change oxygen?

It depends on how many fish you raise, and everything else is nonsense.

I'll give you an example, I also have a tank as big as yours I raise a small grass carp about 3cm in size Feed once every 7 days on average Feed once a time is the amount of 2 fingers pinched Don't ask him to grow up Only promise not to starve to death About 20 days or so Pour out half of the water with a cup and forget to put it full with tap water It's been 3 months Now the fish is still like that It hasn't grown up Because it is put on the desk There is evaporation When you drink water, the rest goes directly to it.

There are pictures and truths.

Aquatic plants are plastic, salt, just use edible salt, sea salt or something is a gimmick, it's better than edible salt.

Your tank is indeed small enough. It's okay not to install a filter pump, but you can't raise big fish, so it's good to raise guppies, red arrows and the like. Just change one-fifth of the water in 3 days.

It is best to soak a pothos in a fish tank, or put 2 stones. The fish tank can be washed, but the pothos and stones should not be washed, so let them multiply moss on their own. These are beneficial and allow your water body to reach balance.

That depends on how many fish you have in it Personally, I recommend that you install a small internal filter, almost no sound, so that you don't have to bother so much to take care of the small fish, or it is easy to game over

The easiest way is to get a small filter bucket, because the filter bucket has almost no sound and can be placed in the bedroom, so that on the one hand, it can be filtered, and on the other hand, the water outlet can be oxygenated.

Sorry, I don't know if I can raise 12 goldfish with a tank 40 long, 23 wide, 23 high, and an oxygen pump with an oxygen pump. But I can give some advice on the number of goldfish bowls to farm.

The size and number of goldfish depends on a variety of factors, including the size of the tank, the quality of the filtration system, oxygen**, water quality, and feeding management.

According to the information you provided, the dimensions of this fish tank are 40 long and 23 wide and 25 high, if your goldfish bowl is a standard size, then it is a smaller fish tank. Depending on the number and size of the goldfish, this tank is suitable for 2-4 goldfish of 5-7 cm.

In addition, the number and capacity of oxygen pumps are also important. If your oxygen pump is able to provide enough oxygen, and the filtration system is capable of handling enough waste and contaminants, then you can increase the number of goldfish appropriately. However, considering the health and comfort of goldfish, it is recommended to keep only a small amount of goldfish in the tank to ensure that they have enough space and oxygen**.

To sum up, if you are able to provide adequate water quality and oxygen, as well as proper feeding management, you can try to keep 12 goldfish 40-7 cm in a tank with a length of 40, width and height of 25. However, be aware that this can be a higher goldfish population and it is important to keep an eye on their health and make sure they have enough space and conditions to survive.

Hello, the density is too much.

Generally speaking, one liter of water to raise one cm of fish, your fish tank is full of 23 liters of water, and it is most suitable to raise four goldfish of 6cm. And you have to leave room for the fish to grow.

If the filtration is forceful and the oxygen is sufficient, you can raise two or three more.

However, with a density of 12 fish, the fish are prone to problems. You can't keep it at the density of the fish store. He is in order to save space costs and ship quickly.

Your tank is about the same as mine, I have 6 fish, the tank is small but the fish density is large!

According to the experience of the "old tanks", one liter of water raises one centimeter of fish, and our small tank raises at most one small fish. Therefore, if the density of small fish in the tank is large, there must be a filtration system, and the oxygen machine does not need to be normally on, but the filtration system must be available, and it must be always open! If the density of small fish in the tank is large, it is necessary to accelerate water filtration, and when the water is in contact with the air during filtration, the oxygen content of the water will increase, and the impurities in the water will also be reduced!

After the water is raised, just change a little bit of water every day! Don't listen to all the fish sellers, who will buy fish after you raise the fish?

I originally thought that the small tank could not raise water, but the fact is that the same can raise good water, I did not have a filtration system at the beginning, only an aeration pump, the water was very muddy for a day, and then I wanted to add filtration, but the filter I bought was too big, not suitable for a small tank, and I learned to DIY a water pump from my predecessors, Another DIY simple filtration (only put the filter cotton), I think the same can cultivate a small amount of nitrifying bacteria, the filtration has been on, the oxygen is turned on for about three hours a day, the oxygen is not turned on at night, the water is changed half a day, the water quality begins to become clear, tender green, a day without changing the water is very clear, there are few impurities in the water, the fish swim very happily, and eat a lot!

I only add a small amount of water every day (keep the filter on, the water in the tank will evaporate some), and the water quality is very stable!

I hope mine can give you some tips and have a good time with you and the fish!

My little tank! <>

It's a red crucian carp, so you don't need to filter it. Feed less, you can also throw in some cheap aquatic plants.

Yes, but feed less. Cheering is a must.

It is possible to use a large fish tank with a high filter to add oxygen.

The fish tank filter is a device used for water purification and oxygen replenishment in fish farming appliances, the purpose of which is to remove feces and other dirt in the water, keep the water clear, sufficient oxygen, no harmful substances, no pollution, and suitable for the growth of fish. If there is always a part of the water or corner in the tank that cannot be circulated, then the water in it is naturally easy to be turbid, and the fish can not get a good living environment. Therefore, the potato ruler in the fish tank has a good Yingdan filter device to add oxygen, so that the fish in the fish tank can grow more healthily.

We recommend that you use a "submersible" or "cartridge" filter.

This type of filter is simple to structure, easy to install, and very low-cost. The submersible filter is to immerse the filter cartridge directly in the pump head and immerse it in water, and the whole filtration process is carried out in the cylinder, the noise is very small, and there is no pipeline leakage, and the power of the pump can be small, so the energy saving effect is good. The filter media in the filter cartridge can also be selected according to different functional requirements.

The submersible filter can also produce a transverse water flow, which is considered a necessary function in the ornamental fish tank, because the transverse water flow can drive the water circulation of the entire fish tank, so that the temperature, dissolved oxygen, fertilizer and potatoes are evenly distributed, and can also promote the biological activity of aquatic plants and fish. The disadvantage is that the filter should occupy a certain position in the cylinder, the area of the filter medium is not large enough, and the filtration efficiency is low, but it is more suitable to use it in the Xiaoqingxingxiao cylinder.

The flow rate of the filter is 600-800l h.

If there are not many fish, just get a finished product on the filter box, and it is not recommended to use submerged water filtration for transporting acres. The reasons are:1

Goldfish prefer to be quiet and have a weak physique, so they are not suitable for raising in water bodies with strong resistance to slag currents. 2.The upper filter cartridge is easy to clean, and the effect is much better than that of the source water.

1. Copy about 10 small tropical fish, or 1-2 goldfish.

2. The requirements for planting grass are relatively high, and the common aquatic weeds are very easy to raise in place, and the aquatic weeds do not directly clean up the fish feces, but absorb the inorganic salts after the decomposition and decay of the fish feces.

3. Most of the fish tanks are glued with glass, and I have one that has been used for 12 years and is still in use normally. Of course, if you are talking about glass glue, if you mean the kind of sealing tape, don't use it.

4. There is a temperature control equipment to raise any small fish, and if you don't have it, you can raise goldfish.