To test free and total Ammonia in Marine or Fresh water.
To test Nitrite and Nitrate in Marine and Fresh water.
To test Phosphate in Marine and Fresh water.
To test pH and Alkalinity in Marine water or high pH in Fresh water.
To test Iodine and Iodide in Marine and Fresh water.
To test Iron in Marine and Fresh water.
To test Copper in Marine and Fresh water.