ATX Koi is an Austin, Texas-based koi and pond business founded by Rajat and Lisa Agarwal, who have lived in Austin since 1999 and share a passion for koi and Japanese garden design. The brand specializes in high-quality Japanese and domestic koi, with a changing selection that includes varieties such as Kohaku, Goshiki, Asagi, Shusui, and butterfly koi. In addition to fish, ATX Koi offers koi food, medicines, pond accessories, and water treatments for local pickup.

The business supports pond owners through consulting, basic pond maintenance, water testing, and non-veterinary koi health care. Its services include general pond guidance and care for certain visible health issues, with health-care visits requiring a waiver. ATX Koi also shares educational resources, including Secrets for Happy Koi, a guide covering pond water chemistry, filtration, fish health, nutrition, and practical management. Inspired by Japanese garden aesthetics, the brand aims to help customers create and care for beautiful, tranquil koi ponds.