A too high nitrate concentration can result in unwanted algae-growth and these might irritate corals in their neighborhood.

Nitrate as such also retards coral growth.

The nitrate concentration in a proper functioning reef aquarium should preferably be lower than 1 mg/L. Fish-only aquariums would usually show much higher nitrate concentrations.

Most test kits use a procedure in which a certain part of nitrate is converted chemically into nitrite and is measured as such.

Once again, just as with nitrite testing, amine interference has a major impact on the measured value. If such an interference occurs concentrations much lower than actual will be measured.

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Test Range: 0.05 to 2.0 ppm

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Quite often a too low calcium concentration retards coral and calcareous algae growth.

NSW contains 400 – 450 mg/L calcium. Which is also the value we should strive for. For a stable aquarium environment the fluctuation in calcium content should preferably not more than approx. 15 mg/L. This automatically means that the calcium test should be able to monitor comparable fluctuations.

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Phosphate also blocks or retards the growth of corals and calcareous algae.

One of the scientific studies shows that a phosphate concentration higher than 0.05 mg/L decreases the growth of calcareous algae by 90%!

Washing fish food, which is a rich source for phosphates in a sieve after thawing reduces the input of phosphate tremendously. Also avoiding use of phosphate-rich low-grade activated carbon helps keep phosphate levels as low as possible. Checking the activated carbon for phosphate prior to use is therefore highly recommended.

Elevated concentrations of phosphate can be removed by using the liquid Phosphate-Eliminator or the highly effective granular Phosphate-Killer. Both also decrease silicate and organics content and adsorb toxic heavy metals.

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