So to round this up and finish it.
The dip in beer seemed not to affect anyhow the Coral directly !
Nevertheless, the carbs does seem to do a lot to the tank if being dosed to the main system.
I had tested the remaining water vs. Vodka vs. Biopellets soaked in vs. Vinegar added.
Results was that the Beered water had the whitest water in the next morning !!!???
I used 100ml container that were standing in the frag tank water over night.
Well, if anyone starts dosing his tank with beer, let me know.
I know a Coral farm is dosing Malt beer into their systems to add carbs ;-)
-Andre