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

[Wheelman76]

Originally Posted by kooky

I think if we had a probe/monitor that constantly shows the Calcium/Alkalinity/phosphate levels in your aquarium at all times without doing individual test, like a temperature or PH probe which are currently available, that would help the hobby immensely.

There is something like that out there already , hopefully they release it soon.

https://reefbuilders.com/2015/07/27/...e-kickstarter/