[reefnut]

finally got rid of the liquid calcium additive and am dripping kalkwasser.i went with the seachem reef kalkwasser.on the label it sayscalcium (ca) 54.09 o/o.is this number telling me that this stuff is only 54 o/o pure calcium hydroxice?and how many ppl are using this particular brand and where would you compare it to other brands?