have a question about my Phosban reactor 150, i first started off with Phosban media then i changed to Kent phosphate meadia becuase thats what my lfs had.. but im reading that Rowaphos is pretty much the best. I just dont know how much to buy, Rowaphos goes by ml as Phosban was 150g. so question is how much in ml do i buy for a Phosban 150.