Possibility of sick Porcupine Puffer Fish

[Fiudom2]

My Porcupine Puffer Fish recently been moved to another marine tank and has gotten a white globe thing around each eye. If you do not understand what it could be i could try to send a picture. We sent him to the smaller tank to clean the water. He was in with a Dotty Back Wolf eel and an epaulette reef shark. Sadly the reef shark died from the low PH range. We then started testing the water and it was really bad. We moved our puffer in with our clown fish, but we separated them. The dotty back wolf eel is sick but we recently purchased some water medicine stuff that my dad put in. We came to this website because last year it helped us with our dying lion fish, your website helped us learn that he had lockjaw from eating too much krill. We began giving him special treatment but sadly he died.
Please help soon we recently had a death we cannot stand another :fish2::fish2::fish2::fish2::fish2::fish2:

 

[Sk8r]

It may be a bacterial infection or fungal.
Ph is not as good an indicator in marine tanks as alkalinity. Get a test for it. Salifert brand is good. Alk should be 8.3 on the DKH scale. Remedy it with DKH buffer. I suspect you are having water quality issues, and that alk and nitrates are likely the heart of it. Run some carbon. Treat the puffer in a separate tank with Melafix Marine. Wishing you good luck.