I just thought of this yesterday but I have a couple of plants sitting in pie pans for trays and I remembered reading in the nep forum that metal baskets would kill them (something about zinc I think). The sarrs seem to be doing ok, new pitchers coming up, but if there's any chance for ill effects then I'll replace the pie pans. Aww screw it - I'll just replace them. Guess I answered my own question.
*Dyflam thanks himself*