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Update
I've changed the filters everyday since our conversation with 25% water change each time.
I installed the green machine UV light and almost a radical change already
This is only two days so I'll expect complete recovery in a week
No fish death either
You guys rock
No I mean rinsing
I never rinse my biological media
One of the reasons I'm big about not doing more than 25% water change unless it's an emergency is because I don't believe in disturbing what they are accustomed to biologically. When I just started I cause new tank syndrome and lost almost every fish NEVER AGAIN lol