Just got new fish and 3/5 started breathing rapidly. All water

I’m thinking maybe the fenbendazole didn’t get all the planaria?

What is happening in my tank?

Pearl Gourami lets tail fin hang down

What’s wrong? It was spinning in circles earlier as well.

Is my goldfish suffering?!?!!

Help me help my sick Damsel!

Mating?

URGENT (read text)

How to get rid of living bloodworm?

May Have Been Posted Before But This Seems Unnecessarily Cruel

Help! sick fish