<a href=showthread.php?s=&postid=8713734#post8713734 target=_blank>Originally posted</a> by colinadam
I found it to be impossible to deal with and had to do something crazy to get rid of it.
I took out half of my rock, let it sit out for a day in the sun so it dried out. Filled up a 5 gallon bucket with a bleach and water solution, soaked the rock for an hour (until it turned white). Rinsed it off real well with a hose and let it dry out inside for a few days. Took a new bucket, used the waste water from my RO/DI and soaked the rock in that. I did daily 100% water changes for a week, the bleach leeches out of the rock that way.
Took it out and let it dry again for 3-4 more days and added it back to the tank.