What reef tank inventions would you like to see?

[ScubaSteve]

Originally Posted by MMAX

Hanna magnesium checker would be nice.

You just gave me an awesome idea.

We can make a spectrometer that plugs into your smart phone which can do all of your tests (like each of Hanna's units combined into one) for about $35. No need to buy each individual checker, just need to get the reagents.

And the phone would have an app that would automatically log all of your measurements and plot them.