Good morning everyone, I am so desperate I had to join. So recently I've stumbled over a problem, I have a 20 gallon with 8 female bettas and 3 albino Cory cats. A few days ago I noticed some of my beautiful babies were beginning to pine cone so I took them out and placed them in quarantine. Before I continue I should add that I recently purchased an African dwarf frog and prior to him being placed in the tank temporarily until I could free up my 5 gallon tank, everyone was doing fine. Is it possible he is responsible? So anywho as each day goes by I notice another one of my bettas looks very lethargic and I just don't know what to do. I've already lost 3 and it looks like I might loose another 2 pretty soon, somebody please help.