I posted this info in a couple of threads, thought I'd add it here. I updated some of the information as far as how much I've dosed, and how long it's been going on.
For people that have a hard time keeping your Alk and Ca levels up while dripping Kalk, I've been doing a little test. Using Randy's advice from. .
http://www.reefkeeping.com/issues/2005-01/rhf/index.php
I decided to try mixing my Kalk with vinegar to give a more potent dose. Skipping all the chemistry talk, the vinegar allows the water to absorb more kalk than water without vinegar. Usually water can only take in 2 tsp. of Kalk, with the vinegar addition you can add 3 tsp of Kalk to super saturate the mixture.
I'm now on my third week and it's doing great. Before I had to use Randy's 2 part to boost my levels to get to my target levels: 420ppm Ca and 3.2 meq/L Alk. I had to add aprox. 1/4 cup of Randy's Recipe #1 every other day to keep these levels. Obviously this is a total pain and I'd forget, levels down, more dosing, etc. All of this was really getting to me. I thought about a Ca reactor but my fantasy team let me down and I just can't justify spending the $$$ necessary to set one up.
So far this has been unbelievable! I have a 9 gallon reservoire that I drip 24/7 Kalk using a Nautilus II reef dosing pump. It takes 5 days before I need to refill. Per the instructions, I use 3 tsp. of Kalk per gallon and 45ml of vinegar per gallon, mix and let sit and then dose. By blind luck this seems to be a perfect measurement to keep my Alk at 3.2 meq/L and Ca at 420ppm.
I haven't noticed any negative effects from the vinegar, I've used aprox. 27 gallons of topoff in the last 2 1/2 weeks. All my levels have been extremely stable, not moving at all.
I thought people with high Ca and Alk demand tanks might be interested in this. Hope it helps someone.