Guppies are a common tropical fish. If you want to keep them in a tank, you can start from the following aspects:

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1. Water quality: Guppies like clean water quality. It is recommended to change the water every once in a while. The amount of water changed each time should not exceed one-third of the total water volume. The following are some water quality parameters suitable for guppy breeding:

- Water temperature: 22-26°C.

- pH value: 6.5-7.5.

- Nitrous acid concentration: low.

- Hardness: slightly higher.

- Water quality: slightly alkaline.

2. Water temperature: The suitable water temperature for guppies is 22-26°C. It is recommended to use a heating rod or thermostat to maintain stable water temperature.

3. Feed: The feed for guppies should be of high quality. It is recommended to choose a regular brand of fish feed, feed it twice a day, and do not feed too much each time.

4. Light: Guppies need sufficient light to stay healthy, and it is recommended to provide at least 6 hours of light per day.

5. Reproduction: Guppies have a strong reproductive ability and can increase the number of fish through reproduction. It is recommended to prepare a suitable breeding environment before breeding. Guppy breeding requires the following equipment:

1. Fish tank: Breeding guppies requires a fish tank of appropriate size. The size of the fish tank should be selected according to the number of breeding. Generally speaking, each pair of guppies needs a 10- 20 liter fish tank.

2. Heating rod: Guppy is a tropical fish and needs to maintain a suitable water temperature. It is recommended to use a heating rod to keep the water temperature stable.

3. Filter: Breeding guppies requires keeping the water clean. It is recommended to use a filter to filter impurities and harmful substances in the water.

4. Oxygen pump: Guppies need sufficient oxygen, and it is recommended to use an oxygen pump to increase the oxygen content in the water.

5. Breeding box: The breeding method of guppy is ovoviviparous, and a breeding box is needed to collect young fish.

6. Lighting equipment: Guppies need sufficient light to stay healthy, and it is recommended to use lighting equipment to provide sufficient light.

It should be noted that the breeding of guppies requires a certain amount of patience and care. If there is any abnormality in the fish, situation, timely measures should be taken.