I quarantined my fish for two months to treat for a bacterial infection. They were treated with antibiotics, put in the display, and appear symptom free. I want to make sure the infection is completely gone before adding new fish. My question is can I put a freshwater Molly in the tank to see if it shows signs of the bacterial infection? I have heard of doing this for ich and velvet.
Use Molly to Test for Bacterial Infection?
- Thread starter Jim C
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That should work, as a FW molly would have no immunity whatsoever to any SW diseases. Just yesterday I was talking to a public aquarium curator who successfully used black mollies to test a large QT for flukes. They showed up nicely against the fish's dark contrast.
Nope, just slow drip a few freshwater black mollies - take 4-6 hours to do it.
If the molly shows signs, it just means the harmful bacteria is still present in the water. Bacteria that your saltwater fish's natural immune system may or may not be able to keep at bay.
