Calcium testing and addition Calcium is a major constituent of calcareous algae, skeletal material of hard corals and the skeletal...

Alkalinity testing and addition Calcium alone cannot form the skeletal material of corals and allow calcareous algae to grow. Some...

Magnesium is present in NSW in a fairly high concentration (1300 - 1400 mg/L). Magnesium is an essential part of...

Nitrate testing When an aquarium has insufficient regions deprived of oxygen (= anaerobic zones) or denitrification proceeds incompletely then nitrate...

Phosphate testing and removal Phosphate has several negative effects if present in a too high concentration. First of all undesirable...

Calcium testing and addition Calcium is a major constituent of calcareous algae, skeletal material of hard corals and the skeletal...

pH Test The pH value can have a major impact on the growth of corals and calcareous algae and on...

Nitrite testing Nitrite is a substance that is toxic to fish and invertebrates. It is a misconception that once a...

Flatworm exit Flatworm exit itself is quite safe to fish and invertebrates. However, the body juice of flatworms can be...

Ammonia and ammonium are substances which should be converted rapidly into nitrite followed by nitrate and nitrogen gas. If this...

Includes Calcium, Nitrate, Phosphate, pH, Alkalinity & Magnesium

50% OFF, these expire 6/2025, acutally probably good for another 6 months after that.   Silicate Test Silicate occurs especially...

COPPER PROFI-TEST Copper can be present in tap water and in salt mixes. If the copper concentration is higher than...

Salifert Potassium Reef TestPotassium concentration in natural seawater is approximately 400 ppm. Many aquarists have reported that a low potassium...