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causing it to close and ingest the mixture
It removes phosphate (PO₄) and silicate (SiO₂)
🧪 What it tests
portable handheld design
It measures:
Hanna Marine Calcium Handheld Colorimeter wwc causing it to close andHanna Marine Calcium Checker (HI758) The Hanna Marine Calcium Checker (HI758) is a digital colorimeter that provides fast, accurate calcium measurements for saltwater aquariums. Designed as a more precise alternative to traditional color matching test kits, it delivers easy to read digital results to help reef hobbyists maintain stable calcium levels essential for healthy coral growth and skeletal development. Features: Digital calcium testing for