How can I get rid of this stuff... I don't have clue how it got in my tank, the Liverock I purchased was from a LFS
that had it sitting for over a month. I put the liverock in when I first set up my tank in December and this stuff first showed up about three weeks ago. For the past two weeks my sister has been taking care of my tank for me while I was out of town. (Thankfully no casualties) but in the two weeks I've been gone this stuff has spread like crab grass... Whats the best (or safest, or easiest) way to get rid of it?