Terry Arko

Terry Arko brings more than 40 years of experience in the recreational water industry and currently serves as Technical Content and Product Training Consultant for HASA Pool, makers of HASA Sani-Clor. His career spans service and repair, retail sales, chemical manufacturing, technical service, commercial sales, and product development—giving him a uniquely comprehensive perspective on water chemistry from both the field and the lab. A respected educator and thought leader, Terry has written over 200 published articles on water chemistry and has been teaching chemistry-focused courses for more than 30 years. His ability to translate complex science into practical, real-world understanding has made him a trusted resource for pool professionals seeking safer, smarter, and more consistent water care. Terry is a Certified Pool Operator (CPO) Instructor with the Pool & Hot Tub Alliance (PHTA) and serves on the Recreational Water Air Quality Committee (RWAQC). In 2025 he was presented the Pool Nation Lifetime Achievement Award. Terry is driven by a lifelong commitment to education, innovation, and advancing industry standards through knowledge.