my rummy school has gone odd...small white dots on dorsals and back ridges...but not on all the fish, just a few
i was feeding them dried tubifex, changed over to tetra bits today for them just incase it was the food (we know tubifex can be nasty)
this is day 2 of me noticing the change in the appearance of the fish, it doesnt seem to be spreading like ich would
any ideas?

regards