I have a 58 gallon tank with one yellow tang; 2 oscellaris; 1 goby; 1 green chromis; hermit crab; snails; 2 peppermint shrimp with 4 different coral species and an anemone. 2 weeks ago I added a lawnmower blenny to help with the algae. Did I tilt the ship with the addition of the 3" blenny? Started tank in October. My yellow tang was picking at the blenny with every move he made for awhile and then that stopped. Is there stress on the fish with that many? My water values are fine so far. I