I found another interesting link from some time ago.
http://www.utahreefs.com/forum/forum...948&PN=0&TPN=1
and another thread with more details:
http://archive.reefcentral.com/forum...readid=1166963
I gathered that: Scottwood Industries = Excel = Driveway Heat = Peladow, all manufactured by DOW
I just started to research using DIY CAL/ ALK and am just caught up in all of this. I have a 50lb bucket of Excel and others have been using it here locally in Denver with no issues to date. Regular water changes should help. Many of us are watching and reading....
/r Dave