actiualy i have a couple of corals that dont look good which is why i was doing a water change. maybe someone else will respond on how the rust would affect the corals.
i have contacted PCI and im waitng for a response but after some research i have found this to be a problem that has been around since 2005 wich in that post they (PCI) said they where making improvement to there pumps but as you can see the same thing that happend here in 2008. i will wait for the company's decision on what they are gonna do before i write them off.
here is the thread from 2005, take a look at the first pic in the post.
http://archive.reefcentral.com/forum...ight=genx+8500
tia john