Ornamental Fish Q&A 11

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A 75-L aquarium contains nine neon tetras, two pearl gouramis, two cory catfish, and a Plecostomus. The owner reports that all the fish were purchased six days ago and placed in a newly acquired aquarium with fresh dechlorinated water and fresh filter material.

In the past 24 hours, four of the tetras have died and several others have whitened fin edges.

Filtration consists of an outside power filter with disposable carbon-filled filter packs. No water changes have been performed to date.

Water quality parameters are as follows:

Temperature = 26°C (68°F)
pH = 7.4
Ammonia = 3.0 p.p.m.
Nitrite = 2.0 p.p.m.
Nitrate = 2.5 p.p.m.
Hardness = 130 p.p.m.



Question Answer Article
Based on the history and water quality information, what is the most likely diagnosis? [[|Link to Article]]
What treatments are indicated? [[|Link to Article]]


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