The water quality is fine enough for all the other fish! I just did a test, nitrates are still present, but they're down at the lowest end of the scale. I have a lot of trouble determining the amount when the colour is not dark enough to block out the comparison chart swatch, but you can see some colour. The carbonate hardness has dropped slightly, but this was anticipated and I have been buffering it (due to phosphate reactor). I don't know if the fish were healthy honestly. I never wanted wild caught fish, but I bought them and it's probably simply stress and not-the-ocean-anymore. He was doing so well, he ate all this Caulerpa that had been growing on my rocks and he looked perfect until... Well... He no longer did.