I drip kalk
daily to maintain my calcium and alkinity levels.
You dont have to spend tons of $$ on Kalkwasser from the LFS
. If you live out in the boonies you might be able to find Pickling Lime at your grocery store. If so you can usualy get it for less than $2/lb.
I use a 1 heaping tsp of pickling lime to 1 gal
water. Shake and let sit for 8 hours or more. Then i use an airline tube to drip this into my tank.