Her secret is that she's addicted to acrylic. Taking pictures through most glass tanks (unless you have the big bucks for starfire or a boyfriend with big bucks

) is tough. There is always distortion of sorts, and it plays havock with white balance and other issues.
The other thing is that, although, Renee has not told me, I would venture to guess that she uses a tripod and a timer. The most subtle movements will cause issues with a good shot.
Funny thing...most people assume seahorses to be boring, and inactive. Yes, they are slow swimmers, BUT.. the suckas NEVER really stop moving. There is always some activity that causes a novice photographer to pull his/her hair out.
And if you think THEY are tough...try getting a good shot of a blue stripe pipefish! Darned torpedos!
Dave