Warning- bad carbon will kill

[michika]

Originally Posted by o.c.d.

michika were you using the HBH brand as well or a different type?

Yes. I also have seen great improvement since I've removed it from my system. My tank is still recovering, my SPS hasn't yet returned to the same colours I had before.

Originally Posted by fencer

There are different pHs for various prepared carbons. I don't think it is the iron as iron salts are an additive in the Ultra products. I suggest it may be something else in the carbon another contaminant? Was there a large spike in algae growth, did any of your yellow sps start turning greenish/yellow? These are signs of overdosing of iron

If its not iron, it is something and it is linked to the carbon in my mind. It happened right after I put it online, and stopped after I took it out of my system. Either way I'm still thankful for this thread because I probably would have been struggling for weeks or months trying to figure out the cause.