Marine 4-in-1 Test Strips

The Marine 4-in-1 Test Strips are formulated specifically for the ionic environment of saltwater, where standard freshwater strips may produce inaccurate readings due to interference from sodium chloride and sulphate ions. The four pads cover the most frequently monitored marine parameters: pH, nitrite, nitrate, and salinity.

The salinity pad uses a halochromic indicator responsive to chloride concentration, providing a rapid estimate of salinity across the 25–40 ppt range to complement refractometer checks. The pH pad resolves across the 7.6–8.6 range critical for reef chemistry, and the nitrogen test pads detect the low concentrations relevant to reef systems.

Each tube contains 25 strips, sufficient for approximately three months of twice-weekly testing. Ideal for aquarists who want a fast daily overview without the full liquid test kit regimen.