Until I have enough room to hook a calcium reactor to my tank, I am using pickling lime dripped in with a doser. I am using a Kent Marine gravity drip. I am adding a spoon full (regular dining spoon, no exact measurment) each time I fill the doser with water (which is about every other day, almost 2 gallons of water). What else do I need to keep in mind and add or subtract to maintain a good calcium level? Last time I checked, I was a little high on the calcium, so I backed off the amount of lime. Is there any other additives I need (iron, magnesium, strontium, etc..)? What will this cause my PH to do? Any and all feedback is welcome.