I just put in my first fish last week - a small green chromis. 30g, 45lbs lr
, w/ hydor 2, protein skimmer and penguin mini. Fish looks healthy, is eating, and the watering readings are all fine. The poor thing looks like it is going to die from exhaustion swimming against the current when it is anywhere but a few peaceful spots in a corner or behind a rock. It this too much 'current' for the size tank? After a while of swimming against the current, it seems to give up and just drift off to whereever the hydro push it. It rests for a while then goes back into the current for another round.