I have been dosing for a while now, but I am thinking about going to a kalk dosing instead. I was thinking of using the Brightwell Kalk+2 even though it is more expensive it has the added magnesium which is nice. I cant decide which method will be more effective and easier. I know people have used the drip method which I believe I may do. I currently have about 1.2 gallons of evaporation per day. Could I set up an effective kalk drip and use it for an ATO also? would I just have to use a lesser concentration of kalk because so much water needs to be added? I was also thinking of using an aqualifter pump to control my top off but I believe that would add the kalk to much at once unless I time it for very small increments. What are y'alls opinions?