What people often don't realize when the see a beautiful reef aquarium is that there is alot of behind the scenes work. One of the many task that we all do is the never ending testing/measuring of our tank parameters. With the many advances in this hobby in the recent years, I think they hit the mark with this one. Check this out: http://reefbuilders.com/2013/11/14/mindstream-aquarium-water-monitor/. Now that you know what it cost, how many of you would drop that coin to get this?