I think it's a great article. You can control F water change and see for yourself. It's always helped in the past for me and I think it's a pretty standard procedure after dosing any sort of meds or treating for bacterial or ich.
It's also pretty standard for big water changes for invertebrates which are wayy more fragile to do large water changes after treating for bacterial infection. The idea is to remove floating detritus and bacteria from the water column, while continuously dosing, to add fresh non infected water. Just remember to preserve the water quality so that the new water resembles the tank water in pH, gH, etc.