For a quickie, I use (gasp!) the aquarium pharmaceuticals test. It's a simple titration with a dropper bottle. It's accurate to +/- 1 dKh and that's all I need to tell me if my alk is stable.
I like the Hanna tester for low range phosphate measurement. None of those standard test kits give me anything close to the accuracy of this one and are useless in telling me if I'm above critical levels that would cause me problems for my sensitive corals.
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180 gal tank, 50 gal sump, PM RFCa6 Ca Reactor, SWC Extreme 250 1A Cone Skimmer, Tunz Osmolator ATOF, Aquacontroller Apex, Aquaillumination Sol Super Blue 6 x 75w Units, Acros/Softies/LPS/Mushrooms/Zoos, Purple/Powder Blue/Yellow Tang/3xBlue Chromis/2xTomato Clown/Lawnmower Blenny
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