How is this possible

[Archreefer]

I just setup a 90 gal reef, about 2 months ago. I used dry Marco Rock is I would not carry over any pest. NO fish have been put into this system without going in a qt for at least 4 weeks with copper, and prozi-pro. Today I noticed ICK on one of my wrasses. How is this possible?

[Giglamesh]

QT should last 6 weeks at least. most pests life cycles will stop by then

[clownfreak]

It may not even be ich/ick. but I believe it has a 6 week life cycle.

[rioshilo]

Cause it's in every tank! just kidding... Maybe it came in with a coral? People usually dont transfer coral to a new mount and not many qt coral, even less qt coral for more than several weeks

[mscarpena]

I say 8 weeks for QT, but that neither here nor there. Also Prazi pro will do nothing for ick and copper levels are very hard to control at a constant level unless you test constantly. I usually use hypo for that reason. Good luck.

[NYCBOB]

it may not be ick. wrasses tend to pick up sand on their skin at times.

[Archreefer]

Copper was kept at .5 at all times, and no fish ever showed ick in qt. I also was thinking maybe on a coral.