Arsenic, like chromium, is usually only found in aquaria if artificial reef decorations or adhesives are used. Arsenic has a toxic effect above a concentration of 15 – 20 µg/l (0,26 and should be removed with phosphate adsorber Powerphos or Phos 0.04.

In many ICP analyses, arsenic is indicated in small amounts. In addition to the technically induced indication “artefact” of non-existent arsenic, this substance is introduced into the tank via animal feed, especially cheap feed with rice flour as the basis, as well as frozen feed and regenerated adsorbers.

In our test report, we give the arsenic value as a relevance value, and it needs to be reduced. The value of 10 µg/l(0,26 which is also the limit value for drinking water serves as an example here. Too high arsenic values from approx. 15 – 20 µg/l(0,26 should be avoided as they lead to partial tissue loss and later die off of the corals. Arsenic can  easily be removed from the system by iron-based phosphate adsorbers.

Value too high:

Partial water change, removal of decoration, filtration via Phos 0.04 or Powerphos.

Value too low:

No dosing intended!

Variety semi-metal
Benefit none
Standard 0-5 µg/l(0,26
Skill Level Red, only for experienced aquarists
Source salt mix, artificial decoration, cement, frozen food, cheap plastic
Available No dosage provided
Importance 1–6 1
Detection quality High

Balling Light:

No dosing intended. Please note the relevance limit in your analysis.


In the Fauna Marin Reefkeeping Systems, the supply of calcium and trace elements is ensured by inorganic products. The supply of vitamins, organic additives and amino acids is regulated separately, additional vitamin doses are not necessary as these are integrated in the corresponding further products and also already in the Balling Light System.