Updated On March 18th, 2017
Pet's info: Fish | Unknown - Fish | Male | 8 months and 18 days old | 1lb
Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS 77
Veterinarian
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Begin by submitting a water sample for quality testing. Most pet stores will do this for free or a nominal fee. High ammonia levels, PH imbalances may be responsible for that. Oxygen concentration and quality of the filters should be determined as well. If water quality is good and there are no major imbalances, Cosmo should examined to look for any sign of bacterial/fungal infection and eventually water should be treated. Please do not hesitate to contact us again on the forum or by requesting a consultation (where you can post pictures ) if you have any more questions or to discuss it any further.
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