Well, yes, therefor one of the pros of kalk, as it precipitates po4 from solution extremely well in freshwater, how effectively this happens in saltwater, I am not sure........ Adding vast amounts of ca (lets assume as cacl) is not really a cost effective way of combatting po4, as the calcium will precipitate carbonates, magnesium, etc as well, all becoming biologically unavailable.Hi Ivan - a quick question - doesn't a high'ish calcium level also assist (or should I rather say - should it not assist) with phosphate precipitation? Where the calcium is supposed to bind with the phosphate and drop to the floor of the tank?
If you look at the study of Farley http://www.advancedaquarist.com/issues/july2003/chem.htm which you are referring to, you will see that he used more than ten fold the recommended dose!! will give more accurate figures when i have time to read it again......Some people will shy away from Ali based removers because one man suggest that it could irritate corals
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