Sounds like second clown brought the infection. Do a treatment and lower the salinity in your qt. Acclimate the fish to this lower salinity.
Also, noticed in your parameter list that your salt keeps going up with evaporation. That is normal. You should add fresh water for evaporation between water changes. Try to keep the tank topped off everyday if you do not have an auto topoff system. Get some phosphate remover cause .25 is too high.
Also, noticed in your parameter list that your salt keeps going up with evaporation. That is normal. You should add fresh water for evaporation between water changes. Try to keep the tank topped off everyday if you do not have an auto topoff system. Get some phosphate remover cause .25 is too high.