http://reefbuilders.com/2015/07/29/answers-top-10-questions-mindstream/
https://www.kickstarter.com/projects/859739753/mindstream-aquarium-monitor/description
So I know there was a thread on this a couple years ago. Looks like it will finally roll out late this year. Have to say if it works it would be really useful. Not cheap but depending on what you have invested it may well be worth it. I'm confident that I have lost over $500 in livestock over the years due to fluctuation that could have been corrected if I had the information. They have a kickstarter going as well and you can back at $495 and get the monitor for less than it will retail.
https://www.kickstarter.com/projects/859739753/mindstream-aquarium-monitor/description
So I know there was a thread on this a couple years ago. Looks like it will finally roll out late this year. Have to say if it works it would be really useful. Not cheap but depending on what you have invested it may well be worth it. I'm confident that I have lost over $500 in livestock over the years due to fluctuation that could have been corrected if I had the information. They have a kickstarter going as well and you can back at $495 and get the monitor for less than it will retail.