ksujason
For pH, ammonia, nitrite and nitrate I like to use FasTest kits by Aquarium Systems.
Their phosphate kits are easy to use too.
For calcium, alkalinity, I prefer Salifert.
This may help your researching.
<a href="http://saltaquarium.about.com/library/weekly/tp/aatptestkits.htm" target="_blank">http://saltaquarium.about.com/library/weekly/tp/aatptestkits.htm</a>