Salifert Calcium Test Kit This RO Membrane is rated

This RO Membrane is rated at 100 GPD (or Gallons per Day) - so that means 100 Gallons in 24 hours

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Use in a canister filter

Submersible or inline use

In case of contact with the skin

Salifert Calcium Test Kit This RO Membrane is ratedSalifert Calcium Profi Test Calcium is a major constituent of coralline algae, the skeletal material of hard corals and the skeletal needles of soft leather corals. In many cases too low a calcium concentration retards coral and coralline algae growth. Calcium also fulfills many important biological functions. In a healthy aquarium, the growth and multiplication of corals, calcareous algae and other organisms can result in calcium depletion. To