Såhär säger Fauna Marin om Flour. Är ju ändå ganska svårt att mäta detta och lyckas isolera det tänker jag, och risken för att fastna i "placebofällan" är hög.
What is this: Fluorine is present in seawater as fluoride. This element cannot be detected by ICP analysis and must be measured separately by IC/HPLC. Fluorine is an essential element for corals. Besides an inhibiting effect on bacteria and algae, it is important for the growth of coral and the defence against parasites. Fluorine also has an effect on the blue coloration of many corals.
Problems: A too low fluorine concentration shows itself in dull tissue, reduced growth, colourless growth peaks or growth edges in foliaceous growing corals (e.g. Montipora species) as well as partial light sensitivity. In addition, the animals become more susceptible to parasitic infestation. The skeleton softens considerably.
Actions: Regular control of the fluorine value, if necessary adjustment of the dosage. Reduction by partial water change and adjustment of the dosage