Will steel hurt hydroponics?

Will a threaded rod made of steel hurt a hydro system.

it shouldn't. what can happen however is rust, which can make it difficult to unscrew. otherwise, no problem. the metal shouldn't transfer into the water or cause problems.

I wasted both of our time

http://forums.gardenweb.com/discussions/1994260/copper-or-steel-effect-on-plants

I would worry about steel on a long term grow, but not 3-4 months indoors. hydro growers tend to change the water enough to where it really shouldn't be a problem. The low acid leaching thing is true, but I bet you could do it just fine. or use plastics.