Sick Behavior

[thutton33]

Hello,

My main question it do fish "FLASH" somtime normally or is that a definate sign of ICK coming or other illnesses.

 

[FMJnaX]

Flashing is usually a sign of disease. It can, however, be that you have a single fish that prefers a group of at least 1 other and is acting lonely and "flashing" against the side of the glass. If the flashing is more regular, then it more than likely a sign of disease.

 

[Billsgate]

Fish also flash as part of mating ritual. What fish is doing this?
If it's doing it on it's own without other fish being around it may be a sign of upcoming disease ---> water quality issues IME