I got two SCWDs a long time ago and never used them much. Yesterday I set up a temporary holding tank for my live rock and hooked one of them up, but it wouldn't work. It worked in the past when the temp tank was used but for some reason water only comes out one side now. I took it off this morning and replaces it with the other one and it did the same thing. I did notice that the first one has stuff rattling around in side it now. I'm only running a GenX 40 pump rated at 1190gph. Do SCWDS break easily? I'm wondering if the parts inside just dried up and got so brittle that the pump pressure broke it.

Any ideas?