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Goldfish tail shows spots


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  • Regular Member

Hi, I noticed these spots on my goldfish's tail today. Any idea as what these could be?

Behavior is normal and water quality is good. It's a 30g tank with 2 goldfish in it. 25% water change is done once a week and water gets topped up throught the week. The tank is filtered by 2 AQ Clear 200 filters. I'll post more info when i get a chance tomorrow, wanted to get these pics up in case someone can offer some advice.






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  • Regular Member

Could you please answer the following questions:

Test Results for the Following:

* Ammonia Level (tank):

* Nitrite Level (tank)

* Nitrate level (Tank)

* Ammonia Level (Tap):

* Nitrite Level (Tap)

* Nitrate level (Tap)

* Ph Level, (Tank) (If possible, KH, GH and chloramines)

* Ph Level, (Tap) (If possible, KH, GH and chloramines)

Other Required Info:

* Brand of test-kit used and whether strips or drops?

* What is the name and "size of the filter"(s)?

* What kind of water additives or conditioners?

* Water temperature?

* How often do you change the water and how much?

* How many days ago was the last water change and how much did you change?

* Tank size (how many gals.) and how long has it been running?

* How many fish in the tank and their size?

* What do you feed your fish and how often?

* Any new fish added to the tank?

* Any medications added to the tank?

* List previous issues experienced (dropsy, SBD, etc.)

* Any unusual findings on the fish such as "grains of salt," bloody streaks, frayed fins or fungus?

* Any unusual behavior like staying at the bottom, not eating, etc.?

* List entire medication/treatment history for fish and tank. Please include salt, Prazi, PP, etc and the approximate time and duration of treatment.

* You can really help us to identify with the concern more accurately if you post some pictures and a short video.

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