to make it easy you can use your own tank water since the fish are already acclimated to it and you're looking to kill all the ich anyway. all you really need is a simple hang on back filter for water movement and a heater. u can also use an air stone. take the carbon out of the filter or just don't put it in. i like cupramine by seachem. ~$8 for the small bottle treats 500g or you can use coppersafe by mardel. cupramine is 2 weeks treatment then 2 weeks carbon.