Which test kits do you find most accurate for all the usual suspects: Ph, Alk, Calcium, Mag...etc.
Thanks
Pretty much you can use any of the popular ones for Ca and Mg and you'll be fine.
Elos and API are ok for trending alk, but I wouldn't use them for determining dosing rates.
Thanks Bryan,
I really looked for that for a while and couldnt find it.
I guess im just about a month late for the discussion. Thanks for pointing me in the right direction 
I personally use api test kits for my alk, ca and ph but for my nitrate and phosphate I am using Instant Ocean test kits.
Instant Ocean kits are very accurate and are highly recommended.
I picked up 2 nitrate and phosphate kits on ebay for $28.50 shipped
using test kits for dosing isnt always perfect , but buying an actual monitor will be super accurate but pricey, I wish I had the cash for a nice controller 
robert - eastbayreefer2010
The RKL basic package is fairly inexpensive and lets you monitor and control with the ability to expand with you get more funds 
http://www.digitalaquatics.com/saltwater/RKL
Some of our Sponsors can get it for you too. I think Robert t Neptune (maybe the closest to you?) at one time could get it.
Precision also is important.
Some of the accurate kits are imprecise, which doesn't help much when you're trying to figure out dosing rates.
More of an issue for alk than Ca and Mg.
Bay Area Reefers Geekifying Everything - Gomer
Yes, you are doing something stupid and people here are trying to help you. - also Gomer