This test kit features a unique dye that has a pronounced color change between 8.0 and 8.3, making it the easiest kit on the market to read in that critical range. Alkalinity may be read from the same sample in 0.5 meq/L increments. MultiTest Marine pH & Alkalinity performs over 75 test...

This kit measures nitrite to less than 0.1 mg/L and nitrate to less than 0.2 mg/L in marine or freshwater. MultiTest Nitrite. Nitrate performs over 75 tests and contains a reference sample for validation.

This kit measures iron in freshwater or marine water to less than 0.05 mg/L. Can also measure chelated iron. MultiTest Iron performs over 75 tests and contains a reference sample for validation.

This kit measures copper (all types) to less than 0.01 mg/L in marine or freshwater. Uses a highly sensitive catalysis based procedure. MultiTest Copper performs over 75 tests and contains a reference sample for validation.