I did a 20% WC
that evening, bring the nitrites down to between .25 and 0. Check it the next day (Saturday) and it was at zero. Checked it again today and it is still at zero.
I was initially concerned about the yellow tails and will still probably take them back just to free up some bio-load for something i would rather have. But that said, they have actually been very good citizens and nieghbors to the new additions. And the really strange thing is that only "aggressive" behavior i have seen, if you want to call it that, was from the cardinal, that's weird. Thanks for all the help.