[StirCrazy]

Stephan to quot the book you like to quote sometimes.. by Anthony Calfo

"many American aquarists have the mistaken impression that the primary function of the calcium reactor is to provide calcium. In truth they are most effective at maintaining high levels of alkalinity (buffering capacity) while providing adequate levels of calcium" Pg 184 in the Book of Coral Propagation.

from that same book the argument for using both Ca reactor and kalk

"by using calcium hydroxide with a calcium reactor, an aquarist may enjoy the convenience of high alkalinity generation by the reactor while reaping the benifits of kalkwasser from increased calcium levels. Kalkwasser will serve to protect the buffering capacity of the sustem by tempering acids with liberated hydroxide molecules, efectivly enhancing the preformance of the calcium reactor. Kalkwasser also improves the preformance of protein skimmers by virtue of a dynamic knowen as saponification. It can be harnesed to assist in stabalizing or maintaining and apropriatly high pH, which will discourage the growth of undesirable algae as well."

I have read the artical you posted Stephane.. and when I say something it isn't a opinion bassed from reading one article.. I read many articles and tests and opinions and then form my opinions.. I always have and I always will..
having said that, can you post a link to whare you found that ratio? I have never seen that and I would like to read the whole thing.

there is a type o in my last post.. I said
"A Ca reactor primarily maintains alkalinity, and also does a ok job of maintaining alkalinity"

it should have said "A Ca reactor primarily maintains alkalinity, and also does a ok job of maintaining Calcium"

Steve