CATDOLL : CATDOLL: Which is easier to raise, goldfish or koi?

In fact, goldfish are relatively easy to breed, but you must create an environment suitable for goldfish growth. 1. Circulation filtration system, which is the kind that pumps water on one side and releases water on the other side. Do not use wall-mounted ones, which are not very effective. As for the power, you can tell the aquarium store the size of the fish tank and they will recommend it. The filtration system runs for different lengths of time depending on the number of fish, at least 5 hours a day. 2. The bottom of the tank should be covered with 3-5 cm coarse sand or pebbles, which can accommodate bacteria and fish feces, and bacteria will decompose fish feces; plant hard water plants, such as sword grass and water banyan, and the nutrients decomposed by bacteria will be absorbed by the water plants. In this way, the water quality will not be eutrophic, and bacteria, pathogens and algae will not multiply. It can reduce the work of maintenance and prescriptions. 3. The light should be on for 5 hours a day to allow the water plants to photosynthesize. 4. Avoid sunlight, which is easy to grow algae and moss. (Some netizens advocate that the new water should be placed in the sun for a few days; some even advocate that the fish tank should be exposed to the sun. These are bad ideas from fish lovers who have never raised fish or have insufficient fish raising experience. Don't believe them.) 5. Don't change the water too frequently. Once every half a month or a month is fine. The new water should be placed overnight and not exposed to the sun. Only one-third of the water can be changed. 6. Goldfish are very delicate and cannot be mixed with aggressive carnivorous fish, such as tiger barbs and bettas. 7. Stocking 4-6 scavengers or moss mice can keep the tank wall clean. There are two types of carp: one is Japanese koi, which actually sounds difficult. Based on my personal experience, I think it is more difficult to raise than goldfish; the other is Chinese native carp, which is easier to raise.