Of course you can, but you have to be diligent. Always check if the water quality is clear, as fish often defecate and some cannot be caught with a fishing net. You can pour the fish into an aquarium or sink with the water, save the fish's droppings, and then put them back in. the aquarium. Do not overfeed the fish. Frequently, feed them once around 9 a.m. and once at 4 p.m. Take a basin of tap water (preferably solar water, I use solar water) and put it in the sun for three or two days. If the fish's water becomes dirty, change the water in it. but change half the water. Unless it is extremely dirty, the fish will rub against the wall in the water and swim away quickly. When it stops moving, change all the water. If the water has just been changed and is a little muddy. Just put as much salt as half-watermelon seed to kill bacteria. Fish need to see the sun, so get that for an hour or two each day. Good for fish. In addition, when changing the water, there will be a layer of lint, which is dust, on the surface of the sun-dried water. The top layer must be evacuated. The above is my aquarium breeding experience, I hope you can adopt it.
The old way of breeding fish is a good experience.
If you use the old way, you naturally don't need to filter and add oxygen.
But there are prerequisites. First, your tank. If it is an unglazed sludge tank or an unpainted wooden bathtub, it is the same as for other tanks, whether ceramic, glass or plastic. Since mud and wood are breathable, other tanks won't have it. enough oxygen.
Secondly,dry the green moss in the tank, coat the tank wall with egg or taro and let it dry for 1 week. Once the green moss develops, the fish will be raised. moss emits oxygen during photosynthesis and is also used to break down harmful substances in water. The seedbed for nitrifying bacteria.
The second step is to change the water in the aquarium every morning and 1 cup in the evening.
The fish may or may not be pumped . If they are not pumped, you can plant from the lotus bowl, use the fish bento as a nutrient in the lotus bowl, and use the bowl. lotus or other plants to break down the harmful substances in the fish.
Regarding oxygenation and circulation, I suggest that if it's outside, just buy a panel air pump solar and add water fairy. If you throw it outside. The air pump is noisy and is not suitable forindoor use, but the air pump does not like to break.
If it is indoors, it is recommended to add a little water. pump and replace the outlet with a Venturi tube to increase the oxygen.
This is much more convenient. At least it eliminates the need to change the water every day.
Plus, when you raise fish, you need more water and fewer fish. Therefore, the body of water is large and the fish are small.