Well my kalk reactor from barraquatics is supposed to arrive today. I dunno exactly how much evap, but it seems like a pretty good amount.
Alberto, are you formally testing your Mg and Iodine? I have heard from some that strontium isn't really ever lacking, yet others say that it's particularly important for clams (which are DEFINITELY on the stocking list whereas sps may not be).
And like Laurence, I'm also interested in which products you are using to supplement.
As of yet there is nothing other than algae photosynthetic in the tank. Just some fish and cleaner shrimp to break the thing in. The purple tangs, some green chromis and some PJ cardinals--the Hawaiian cleaner died (predictable I know) as did one purple tang and one PJ cardinal has a bad tail (something got it) so I dunno it's gonna make it. Otherwise my biggest problem is that the green chromis keep going over the overflows into the sump where they evade my netting attempts. So about half of 'em live in the sump now and half in the tank.