Hanna Pocket Checkers are compact, digital test kits that give you lab-style accuracy without the complexity, making them a favourite among reef keepers. Each checker is dedicated to a single parameter (like phosphate, nitrate, alkalinity or calcium), providing quick, easy-to-read results on a small screen so you’re not guessing colours on a chart. Simple to use and highly repeatable, they’re ideal for anyone who wants more precise control over their water chemistry, whether you’re running a simple fish-only tank or a high-end SPS reef.
