Keeping pipefish, what is your take on this?

[morecowbell]

I kept seahorses for years but then I tried pipefish. I got 2 and they did well the first few weeks, eating the tiny pieces of frozen mysis. Then they started hiding in the back and never came out again. I'm sure they are long gone and maybe they starved or were too stressed. Captive bred seahorses are easier in my opinion but have more requirements in terms of the tank and tankmates.