Not sure why the rocks came out so purple.. Hit auto balance once, must be the new iPhone. Otherwise VGV seems to be working well. In a month I've got nitrates down from 20 to 5, po4 was .06 now .04. Might save up for a apex. DD 1ml/min peri pump is ordered so can auto carbon dose while away. No more coral will be added as I'm flat outta space, even for an abro :-(