Unfortunately - none of your things are likely to be that helpful *unless your filter socks are small enough to filter out CI. The skimmer will help perhaps - but not fix the problem. It might help if you asked what part you didn't understand about the recommendations?
I think what was said was: remove the fish from the tank - and treat them for CI (ICH) with Copper or another medication as per directions - and leave the tank with no fish in it for 76 days (i.e.the fish need to be out of the tank that long) - or
Try to decrease the amount of CI in yoru tank (the free swimming infectious parasites - by UV or diatomaceous earth filtration or just waiting. A certain number of fish will likely survive (assuming its CI and not velvet) - perhaps all - depending on their underlying immunity.
Its certainly a hassle/nerve wracking time either way - good luck

. Others will likely respond as well