What do you use for 2 part?

I've been using BRS for well over a year and that seems to be the easiest and cheapest. I started out using the reef calculator on their website a lot but then I eventually got the pumps and now I only have to test the water about once a month and add the difference.
 
I use C-balance as well. I go through a 2 bottle kit in just over a month. I have to dose a lot (at least I think that's a lot) (7-10mL/day). My coral per gallon ratio is pretty high though. For my larger tank (which is not set up yet) I purchased the BRS kit, because it is a bit more cost effective.
 
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