Natural seawater phosphate levels range from under 0.01 mg/L to 0.3 mg/L, with reef aquaria ideally kept at 0.2 mg/L or less for corals. While generally non-toxic to fish and invertebrates, phosphates should be below 1 mg/L to control algae. The MultiTest™ Phosphate kit accurately measures inorganic phosphate down to less than 0.05 mg/L in both marine and freshwater, though freshwater samples often require dilution due to higher concentrations.

Boxes of 6

The MultiTest™ Ammonia kit accurately measures both total and toxic free ammonia levels in fresh and marine water down to 0.05 mg/L. Its unique chemical basis minimizes interference from other substances, providing reliable readings of the crucial free ammonia form. This comprehensive kit performs over 75 tests and includes a reference sample for result validation.

Boxes of 6