The golden koi guppy is a popular and striking variety of guppy fish, known for its vibrant gold and white pattern resembling that of a koi fish. These fish are generally hardy and easy to care for, making them a great choice for beginner fish keepers. 

The ideal pH level for golden koi guppies is between 7.0 and 8.0, with a temperature range of 75-82°F (24-28°C). It's important to maintain consistent water conditions and perform regular water changes to keep these fish healthy and happy.