Hi Rob - yes I have been battling excessive Ca (chemical) deposits....just figured it was part of the game.
Calcium is up a bit, not skyrocketing like that! Since ya asked:
1.7.12 at 2:30 PM (lights on for 1 hour only); Temp = 78.3, pH = 7.93 SpGr = 1.027 (Salinity = 38),
Ca = 440
Alk = 9.072 dkH
Mg = 1200 ppm
I found this ref:
http://www.reeffrontiers.com/forums/f14/simple-water-chemistry-59569/
So it looks like my Alk & Ca just passed each other, nice!
post #1 & #4 interesting!!!
also I found:
http://www.reeffrontiers.com/forums/f25/reef-calculators-85/
very interesting (not all of the links work)
Frag Tank is on the same sump; we shall see how that pans out!
Picture (I hope!): (it worked...very exciting picture w/ just actinics on!)