Hanna Marine Magnesium Checker green When preparing water for a

When preparing water for a water change: For every 10 US-gallons of water to be changed

as accuracy will be affected

Provides elements utilized to incorporate into natural biopigments for coloration

Salts of Barium

It isn't only useful when you're away on vacation

Hanna Marine Magnesium Checker green When preparing water for aStop relying on chemical test kits that have limited accuracy. Get accurate water testing results with our simple handheld colorimeter for freshwater. Don't waste anymore time matching your sample to a color chart. With our magnesium hardness colorimeter you get more precise technology than your typical chemical test kit. Our handheld colorimeter eliminates the hassle of color matching by providing a direct magnesium hardness result digitally. Easily