reasons for flashing rocks?

[guardrail]

ok heres my stocking list

2x false oc. clowns.
1x royal gramma
1x diamond watchmen goby


now I have seen them all at one time or another flash against the rocks or sand now my question is does this activity mean that they have ich 100% or is there other possibilities for this... none of them have any white spots but i know thats not a reason for me not to believe in the possibility of no ich...

 

[LargeAngels]

They have some parasite which they want off their bodies. Now to figure out what. Common parasites are ich, velvet or flukes. Do a FW dip in a clear container. If you see "dust" on the bottom then velvet, "jelly" like things on the bottom then flukes. Nothing on the bottom then ich. Hypo or copper for ich. Copper for velvet and fluke tabs or Prazipro for flukes. Best done in a seperate tank with no rocks or inverts.

 

[fishyvet]

There are other reasons for flashing than just ich. Fish flash because of irritation to their skin or gills.

What's your water quality parameters?
Do you run ozone?
Were your fish QT before adding them?

If everything is in line and everyone is eating well, active, and not showing any overt signs of disease, I would personally wait and see. That said, you may want to look into procuring a QT set up, if you don't have one already, to be ready to treat if you need to.