does your tank really have a high Ca demand? not really being packed full of Ca demanding corals
do you have any problems with your Ca reactor throwing off your balance?
After I dialed in the reactor, it maintains the parameters pretty nicely... It was keeping CA at 400, now it is up to 450 (where I want it) and the DKH stays pretty close to 11. I still supplement with the BRS Magnesium solution...about a pint every two days...just enough to keep MG up around 1350-1400.
LL