Hi,
1. Use 1-2 teaspoons of Kalk per gallon.. let stand for atleast a few hours and then drip the top portion into tank to replace evaporated water.
2. B- ionic...add ( to start with ) one mL per 4 gallons in tank daily ( preferably in the morning when pH is lowest)
I use b ionic b/c it is very easy and fast and works very very well.
-Josh-