Ich

Hey guys, I have a 90g reef, and a 20g reef, In the 20g reef I have a fish that was sick with ich, i was treating it, however it did not make it. I am trying to decide if i want to be done with the 20g and move all the rock and pumps into the 90 gallon and just work on that tank. Is ich something that will be in the live rock and could infect the 90 gallon by moving them into it or is it just something that is in the fish?

 

Yes it can be carried in by the rock.

 

^^+1

 

What can i do to treat the rock or the 90g tank to be sure not to have a ich problem again?

 

I think if you leave it for a month or so, eventually the ich will just die out because without a fish (host) to infect the ich cannot survive.

 

2 months (8 weeks) actually, to be on the safe side. No less.

 

Can ich be carried on a crab also?

 

It can be carried on anything technically, even water (although unlikely).