Welcome to the site!
sorry for your lost...
I just want to share my solution about fighting ich that's works for me...
I used Kordon aquaherbals(100% organic) and works real good.It will not harm any of your inhabitant in your tank.
everytime you use this turn off your skimmer and remove your carbon in your filter...
It's up to you if you gonna use this one or not
you can buy this in your local pet store...
As I said It's up to you