With the Salifert Profi Test Si you can determine the Silicate content in freshwater oder seawater exactly and easily. Silicate occurs especially in tap water or in purified water when the RO or DI unit is not functioning properly....

The Salifert Profi Test NO² -Nitrite- is for the exact and determine of the Nitrite content in freshwater, seawater, osmosis water or water from garden pond. Nitrite is a substance that is very toxic to fish and invertebrates. It is a misconception...