To calculate the drip rate I belive you would need to know how many drips make up a gal
of water so you could then find out how many drips per sec or how many sec's between drips so you drip 1 gal
in 24 hours. Honestly it does not mater if you drop 1 gal
in 4 hours or 8 hours.
If you add to much kalk
to your system your calcium will eventually get to a saturation point where it will precip out of soultion (some refer to this as snowing in your tank). You should only add as much kalk
as you need to replace the calcium that is used up by your system. If you can maintain 400-450ppm levels naturally with just water changes then you honestly dont need kalk
but if your finding that you need to dose calcium additives almost daily to maintain that level then a kalk
drip will be a good solution. Again the amount you need to add will depend on your tank's intake of calcium so with some experementation the first week keeping a good eye on the calcium levels as well as your alkinity you can find a good medium to the amount of kalk
to water and the amount of kalkwater dripped over a 24 hour period.