<a href=showthread.php?s=&postid=8239487#post8239487 target=_blank>Originally posted</a> by jbittner
Ich can come in on LR. Learned this the hard way. I got some live rock from a fellow reefer breaking down his tank. I never thought to look at his fish but within 12 hrs of adding the lr to my tank my 8 yr old yellow tang was scratching, and showing white spots in 24 hrs. Thankfully I found Ich attack (just dose twice as long as directed). Ich can stay dormant for 4 wks.