[FishyFishy!]

I use it religiously. Love the stuff. I have a 10 gallon Kalk tank that has an Innovative Marine Accu-Drip that goes into the return section. Works great. I rarely have to supplement Ca or Alk. My drip is set to about 1 per second. Keeps my parameters very stable.

I would use a reactor and use it with my auto top-off, but I evaporate about 7 gallons of water a day, so I think that would be a little much.

You just have to worry about swings. I got really sick a couple weeks ago, and let it run out. With no kalk dripping on my system, my alk dropped to 5.4 dkh. Got kalk burn on all the tips of my SPS. I'm about a week after getting my levels all correct again, and the corals are almost back to normal. But goes to show you that things can go wrong if not attended to properly (like everything in this hobby).

Kalk on low-medium demand tanks is still a great way to supplement the tank IMO.