Testing devices/kits approved for DSR users : (rev. September 2022)

• Salinity: [EZ] D&D H2Ocean Refracto meter, Calibrated at 33ppt with DSR reference
• Alk/KH: [EZ] Salifert KH
• Calcium: [EZ] Salifert Ca
• Magnesium: Salifert Mg
  – Potassium: Salifert Potassium*
  – Strontium: in evaluation (not required when dosing (CaSr 1:50)
  – Boron: Salifert Borium (very limited shelftime)
  – Iodine: in evaluation (not required when dosing 0,003ppm/d)
• Phosphate (PO4): [EZ] Hanna HI-736, *Salifert PO4 (low range, use 20ml – 2022 version).
• Redsea PO4 test is NOT recommended for values higher than 0,08ppm.

• Nitrate: [EZ] Salifert NO3*
  Iron: testing not required. (do not try to make iron measureable, prevent overdosing)
• = Essential kits
  – Finetuning kits
  [EZ] = EZ line kits
  green = prefered choice
  * marked = value for your money.

Always use the DSR Reference to validate your own testing kits