CATDOLL : CATDOLL: Which is easier to keep: koi, goldfish, or guppy?

1. Which one is easier to raise: koi, goldfish, or guppy?

Guppies are the easiest to keep! But you live in the north, so you need to use electric heating rods to heat them in winter! If you use a small round tank to keep them, koi will definitely not work, because they need a lot of living space... So I suggest you keep guppies or goldfish. Guppies need to be heated in winter, but goldfish don't need these two. You can choose one according to your situation~

2. Why can't the koi I bought survive? Some died on the same day, and some died after a few days. I added oxygen mercury

I bought it too, and it was fine when I took it out with the original water. But when I put it in the tank, all of them died in just one hour.

3. How big is the koi fish?

This has nothing to do with size. If you keep the water right, you can keep any fish. Otherwise, even the best koi won't survive. The most important thing about raising koi at home is the stocking density. It is best to use a floor tank to raise koi. Vertical tanks generally don't raise koi well. I won't go into details about the reasons.

4. Which one is easier to raise, koi or goldfish?

This depends on the time of raising. Tropical fish are easier to raise in summer, and heating rods are used in winter. Goldfish are not afraid of cold, easy to raise in winter, and love to raise in summer. Koi are considered hardy among goldfish.