I have about an 800gallon SPS system and I use Balling system via Profilux doser. Much easier to maintain and dial in. No more sudden failures(plugging of the Mazzei injector) of the Ca reactor just as I am about to leave on a trip.
I go through 720ml of Alk a day. It got to the point where I was using so much chems that I just bought in bulk and started producing smaller sizes for people to use in their tanks. My philosophy in this is I sell the same products I use. Check out
http://www.oceanfreshaquarium.com/aquarium-additives/ or click my banner on this site.
Here is a pic of part of the tank.
and a few of the corals
Cheers,
Tim