Yes, I think you are on the right track and that we should treat this tail problem using broad-spectrum antibiotics together with a good antiparasitic medication (i.e., metronidazole) administered orally, rather than using the Diamox.
You did the right thing by isolating the seahorse and treating the hospital tank with the medication you chose. It sounds like you detected the problem early on and began treatment without hesitation, so hopefully you’ll have a good outcome. As you said, beginning the treatment while the seahorse is still eating and able to keep its strength up is very important and allows us to administer medications orally that we would be otherwise unable to use this time.
As long as the seahorse is still eating well, so that the medications that we mix with its frozen Mysis will be ingested, this should be a very helpful treatment regimen, seahorsegirl.
And it’s great to see that you have such a well-stocked medicine cabinet in case further treatment is required.
Best of luck restoring your seahorse to good health again, seahorse girl keep up the good work!
Pete Giwojna, Ocean Rider Tech Support