That’s difficult to say, sir. It depends on the type of parasite and the life cycle of the parasite.
If the upraised, white pimple is the encysted stage of some ectoparasite, the cyst may be rendered unviable by the antiparasitic medication, but the only indication of this that may be evident is that there will be no new pimple-like growths appearing anywhere on any of the seahorses…
On the other hand, if the suspicious pimple-like nodule is a bacterial or fungal lesion, it may respond well to your upcoming treatment regimen with the Seachem NeoPlex combined with Seachem Focus. Your seahorse will be ingesting a good broad-spectrum aminoglycoside antibiotic (neomycin sulfate), and if the bacteria or fungi are sensitive to the neomycin, the lesion should clear up and disappeared during the course of the treatment.
Best of luck with your ongoing treatments, James! It sounds like you’re doing a great job of administering the metronidazole orally thus far.
Pete Giwojna, Ocean Rider Tech Support