Grins, I have been reading some of your posts. Boy have you been busy since May. Your tank is coming along nicely. Did you get your ca/dkh/mg sorted out? I use the two part solution by Randy Farley Holmes which works great. Maintains my ca at 400 dkh at 7.5 mq/l and my mg at about 1300. It has done wonders for stablizing things. My clams seem to love it as my derasa has grown from a 3 inch baby to a monstor 9 inches in under a year..... good luck and keep up the posts. They are interesting....and besides there are not enough of us reef chicks out there.