Ick is rapidly killing off my tank
I didn’t notice it as soon as I should’ve because I’ve been working double shifts for the past week but 3 days ago I noticed ick on all of my tetras in my community tank. I immediately dosed it with top fin ick remedy and am now half way through the treatment. When I first noticed it I counted around 10 tetras in my tank ( I have a very heavily planted tank so accurately counting is impossible) but today while doing my water change as directed I could only count 3 or 4 tetras. I found the corpse of one along with my female betta, my betta seemed a little sick yesterday but not near to the extent of my tetras so it caught me off guard.
I’ve had ick before and treated it but I’ve never had this rapid of a decline before. My water perimeters and perfect and have been the most stable they’ve ever been in the two years I’ve had this tank. I also haven’t introduced any new livestock in months so I’m confused on how this outbreak even began.
Does anyone have any advice?