I made my own sw rock on 2/20/2010. i have changed the water once a day and sometimes twice a day and the PH is still going crazy. none of them are round, almost all of them are flat peaces no more then 2" thick. how can i get the PH down. i need the rock like now, i know i that there is no trick that will get it done that fast but there has to be away to get it done faster then what its doing now.any help would be great... thanks