I have lost 4 puffers (1 stars and strip, 2 mappa, 1 starry) my dog face don't seemed to be bothered by it all the rest of the fish in the tank seem to be fine, the pic shown here happen over night side of his face swelled then the white spot showed up and since then hasn't eaten , I lost a giant Zappa , and stars and strips with this parasite or????? whatever it is copper is being treated in the tank since the 8th of June, (copper power). please if you have any idea please let me know meds and dosage usually after 2 days the fish dies (puffers only except dog face. Thanks for your time