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

[Etaloche]

Originally Posted by ScubaSteve

What kind of precision would people want for calc/alk measurements? Most test kits only give you 5% precision (i.e. 400 ppm ± 20 ppm), Elos is a bit better around 2.5%. Is that good enough? Is there a need or want to go better than that?

I'm sure most people would want as much accuracy as possible unless it significantly increased price. If that's the case 2.5% should more than suffice for most hobbyist.