What doesn't exist for reefing yet but you really, really wish it did?

[Etaloche]

Originally Posted by ScubaSteve

They're doing theirs through spectral analysis of a reactant test... never made sense to me to do it that way. Too complicated. Too many things to go wrong. No wonder they are struggling!

I was doing some reading tonight and it seems it should be fairly straight forward to make a carbonate selective electrode (provided I can synthesize a molecular tweezer ). In fact, I think I could put pH, Calc, Alk and Nitrate all on the same electrode.