second Gary's comment. I've read B-Ionic is good stuff, then again I've read the price tag and seen oodles of outstanding tanks that use regular 2-part. You can make it yourself using Randy's recipe, or order the powder from BRS (support ABC and order through them, they should price match BRS).
I like 2 part, a lot of folks use kalkwasser, though in a high demand tank this needs to be supplemented with 2 part. I avoid kalkwasser because of potential damage to pumps.
all you need to do is get your levels correct, THEN dose in EQUAL parts. I check KH regularly and Calcium once a week. since I dose equally I can tell from the KH if things are not dosing properly. that and the KH test is cheap and quick.
if you go this road consider the following setup. It took me a while to put this together, it served me well. I now use dosing pumps and still use the drippers for minor corrections.
use the calculator gary linked to figure out how much to add.
(3) one gallon jugs (calcium, alkalinity, and magnesium) (
http://www.bulkreefsupply.com/store/clear-one-gallon-pvc-jug.html)
(3) pumps (
http://www.bulkreefsupply.com/store/one-ounce-dispensing-pump.html)
(2) 100 ml graduated cylinders (1) for calcium (1) for alkalinity
(1) 250ml graduated cylinder ( for mg)
(1) 250ml measuring cup
(1) funnel with a large opening from an auto parts store (makes pouring into the bottle easier)
calcium (Calcium Chloride)
alkalinity (soda ash)
magnisium (Magnesium Chloride)
epsom salts (walmart)
(2) drippers to slowly introduce KH and calcium (
http://www.bulkreefsupply.com/store/calcium-and-alkalinity-dripper-aqua-breed-200.html)
it's a lot to buy at once, but it will hold you over for a while and the recurring cost is low.
enjoy!