4FordFamily
Tang, Angel, and Wrasse Nerd!
View BadgesStaff member
Super Moderator
Partner Member 2024
Excellence Award
Reef Tank 365
Expert Contributor
Article Contributor
Hospitality Award
INDMAS Member
My Tank Thread
That leaves disease. Velvet is a fast killer that does not always exhibit physical symptoms (can suffocate a fish inside the gills.) Or even ich & flukes can reside only in the gills, and would cause fluid build up which can suffocate an Achilles.
This. Exactly. Literally no obvious symptoms at all.