Originally Posted by DanRamirez57
So the rock was once in someone's tank then removed and dried out some was left out and had mild on it that I scrubbed off. It's a cycled 75 gallon that currently has 50 lbs of live rock in there.
You need to cure the rock before you add it to your tank. You will chance an ammonia spike if you just add it in.
Also, get it cycling in a separate container will RODI
. Right now you are essentially infusing the rock with phosphates from your tap. Algae will probably bloom!