Just noticed
Wildreef has a pinpoint Ca monitor for sale in classifieds -
For Sale
This is really a cool tool for those that keep or want to keep SPS corals...
(note: he also has for sale: ""monitor made by neptune is PH and temp/orp and can be bar graphed on your computer. And has wave maker / lighting options the whole shabang Including the timers and sending unit.")
Now that would be really neat to have also for you guys into aquarium gizmos. If I had the $$$ would be all over this...PM him and make offer in $ or trade. (he is good guy and am sure will make a great deal)
Good deal! 
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