ALGAE ex for sea water dosage: 15 ml. on 250 litres aquarium water ALWAYS EVENING!!!!!!! (evening the photosynthesis of the algae is stopped and one can fight it thereby better.) each SECOND DAY repeat up to SUCCESS!! Please....relativ exact litre number take no self over-estimation further: It does not work against ALL ALGAE thread algae and of them used algae ball algae even Kalkalgen(Halimeda) etc. it works itself against LUBRICATION ALGAE, there it thereby not around algae, but acts around bacteria. On the other hand there are other means. Admitted damages: NO (with exact dosage) also StoneCoralls such as Acropora are not damaged. A lighter waste of the redox potential is to be determined. WITH BAD INFESTATION ALSO A TEMPORARY WATER TURBIDITY IS TO BE DETERMINED. Skimer should be well adjusted. NO OZONE or COAL during the treatment began. Also a water change is not recommended during the treatment. Trace elements should not be used within the treatment also. The light intervals will I on at the most 6 hour (blue phase can be surely longer, this refers to the HQI or daylight/neon tubes) to minimize, which fasten a faster the means effectuation.