Beautuful room. I like the light purple. As long as you have the speaker fronts out at least a foot further than the tank, while perhaps not ideal,I don't think you have to sacrifice much and mostly in the area of soundstage.
And it can greatly add to enjoyment to have something beautiful and relaxing to gaze at while listening. That itself can open open your musical perceptions. We talk about so much mattering all the way down to power cords, but seldom discuss another critical component, the listener. If the listener is relaxed, unhurried, discerning but not overly judgmental, in a whole brain or right brain state versus primarily left brain, music will work its magic much better.
