stainless steel screws and the coral

[area]

I've installed a magdrive pump in my sump and I noticed the stainless steel screws, and I was wondering if they will cause any harm to the coral.

[Henry Bowman]

? I've never noticed stainless screws on a mag drive and I have 1 in a small tank. Never created a problem for me though. In general it's a good idea to leave any and all metals out of your tank. Are you sure your pump is made for a submerged application (I too thought all mag's could be submerged)....

Maybe someone else will chime in?

[capn_hylinur]

Mag pumps are made to be submerged(their real applications are for ponds) If you submerge it then you may be causing a heat problem in your tank---watch your temp carefully.
I'm running a 3600mag to pump from a basement sump(9 feet head)--its noisier not in the sump but it does generate alot of heat.