[quote author=patchin link=topic=3165.msg34844#msg34844 date=1203788911]
Opinions on this method of adding kalk and reducing NO3. thanks, Steve
http://www.reefscapes.net/articles/breefcase/kalkwasser.html
[/quote]
That's a very good article.
That's the method I use myself. I set up a kalk resevoir instead of a reactor. And I add vinegar to the kalk water.
I have enough stonies in the display tank that saturated kalk can't keep up. I have to add vinegar to dissolve more kalk into the water.
I probably could use a bit more vinegar. I'm adding a little over 15ml of 5% vinegar per quart of kalkwater.... 250ml per 4 gallons. And I still add 2 part once in a while, but that may be due to the system trying to get alk/Ca/pH in a stable mode after the recent precipitation event.
I'm not using it for nitrate reduction though, and I don't test for nitrate.
My prop tank gets by with straight saturated kalk... no vinegar. I probably could add just a little bit of vinegar to that system too, since I add a small amount of 2 part every few days to get things where I want then. Typically I'm bumping by .2 meq/L every few days.