How long since you changed over tanks? Mind telling us NH3
really has to literally skyrocket to affect fish, but can signal whether your NO3
is measuring high or low. Either case, it is NH3
you should be worried about since all tanks will have residual NO2
that most test kits cannot test at. I agree with the water changes since you pretty much disturbed all the sedimentation and organics that are now probably in your water column and if anything your fish are at risk from possible NH3
and low DO (Dissolved Oxygen) until things calm, depending on when you actually transferred.