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You may try to determine which(if any) disease your fish may have by comparing the symptoms to the list below. The list is not complete, and some symptoms can point to multiple diseases. Please be careful, since a wrong diagnosis can result in death of the fish.


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Possible cause
Scales protruding, fish look swollen Pseudomonas fluorescens/ Dropsy
1mm large white spots on the body Ichthyophtirius/Ich, Ick
Cotton like substance in or on the mouth of the fish Columnaris, Saprolegnia,
Small white or yellow spots all over the body. Oodinium
Whitish milky large spots on the body, discoloration, fish swim slowly. Neon tetra disease, pleistophora, plistophora.

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