Kalk Q?

[SeaHorse_Fanatic]

For what its worth, I use a 2L juice jug, add several tablespoons of kalk, add water, let sit for 1 hour at least, pour the semi-clear solution into the sump but not the concentrated slurry on the bottom.

I do this several times a day into my 210g with 75g sump with no problems & good coral growth in a heavily stocked (both corals & fish) display with a high calcium requirement.

On some of the sps, am achieving at least a cm/month growth.

Anthony