Light : Lovely bright light will keep your prickly fella at his best. He will also tolerate partial shade but if you want him to flower then you need to get him in the sun.
Water: Water thoroughly perhaps fortnightly? Let the soil dry between waterings and make sure there are holes at the bottom of his pot. Make sure you leave him dry in the winter
Humidity: Your opunita won’t thank you for any misting.
Temperature: Your household temperature will keep your spiky friend looking spiffy. Don’t worry about him getting a bit cooler overnight. It gets quite cold in the desert at night time.
Food: During the spring and summer months you can feed your cactus with cactus food once a month.
Toxicity: While not toxic, cacti are pretty prickly which your small creature might not particularly enjoy.