Flashing in my native tank

[AMcCaleb]

Hey guys I have a 75 gallon longear native tank. It has 8 juvenile longears, 1 juvenile green sunfish, 1 juvenile bluegill, and 4 creek chubs. I've been seeing some flashing lately from my sunfish but no other signs of sickness. I haven't introduced any new fish into the tank for a little while and have been doing weekly water changes of at least 20-30 gallons. The flashing is the only symptom I've seen so far. All are eating healthy, no lost fish lately, all are active and have settled in very well. I haven't noticed any physical signs of sickness either. Any idea what it could be or what I could do? Doesn't seem to be ick, no other signs of parasites or fungal growth. I really haven't introduced anything different into the system in a while now. Suggestions please...


Sent from my iPhone using MonsterAquariaNetwork app

 

[drewby23]

I know a fluctuation in water hardness can cause flashing.

Sent from my SGH-S959G using MonsterAquariaNetwork App

 

[AMcCaleb]

Maybe, but I've been pretty good with the water changes and I haven't changed the source of the water.

 

[JasonsPlecosCichlids]

I don't see it as a problem unless they have ich. I see fish flash in the creek all the time and they do the same in my tank.

 

[Gill Blue]

I'm with MasterB, as long as there's no visible problem and the water's good, I don't worry much about it.
try paying attention to how much you rub your nose, scratch an itch, or smooth your hair every day.
now imagine doing it without hands.