I’ve lost several fish in the last week due to ich. I have a 20 gallon tank setup ready to move everyone over I just don’t know if it’s best to do so slowly or not. I have a sponge in my sump for over a month sitting by the skimmer, I assume that’s all I need? My plan is to go fallow for 76 days minimum and eradicate the ich permanently. All purchases from now on will be treated as well.