I was friggin right? Huh, and after I posted I thought I was wrong.And the answer is...
The specific answer I was looking for is CO2.
A. At room temperature, I am typically either a gas or a liquid
'
CO2 is a gas at room temp and pressure, and can be a liquid when under pressure such as in a cylinder used for a CaCO3/CO2 reactor.
It would only be a solid at room temperature under extremely high pressure (>1000 atmospheres) that would not be encountered in everyday life:
B. The fraction of reefkeepers who experience displeasure with me is more today than ten years ago (in my opinion)
I was basing this on the increased focus on pH related to hard coral growth, and the unhappiness many find in realizing that indoor CO2 levels are driving their high tank CO2 levels and hence low pH. Ten years ago, not focusing on pH was more prevalent.
Good one randy, these questions really make me think.