Does Ich attach to star fish

Ick will not affect starfish or any inverts and will die off without any fish host in the aquarium in about 6 weeks, 8 weeks is better though to be safe. The fish will need to treated with copper or hypo to get rid of the infection on the fish. QT'ing them alone will not get rid of it. Good luck I've been there.

 

If you can I would recommend 100% DT water. If you just setting it up you will need to monitor ammonia and nitrites closely as they are likely to show up and be prepared to do large water changes to keep them in check. What type of filter do you plan on using for the QT? Be sure to have a copper test kit that is compatible with Curpamine also. To high of level can kill fish and to low will not be effective against ick.

 

If the fish are severely infested it may be beneficial to do a fresh water dip before putting them in QT this will kill some of the ick cysts attached to the fish. (Match temp, ph and alk in the fresh water bath first though). The copper will only kill the ick when it is in the free swimming stage. You may also want to be prepared with some Maracyn Plus for secondary bacterial infections that may show up caused by the ick leaving open wounds.  If you need anymore help let me know.

 

That should work fine if you take the pads out of your sump and into the QT with copper do not put them back in your sump after treatment you could get residual copper into your display which would not be good.