We have a 110 Gallon marine tank on the back wall of the listening room... all of the filters are in the basement and the only sound from the tank is that of rushing water (which is actually quite soothing). The tank actually helps to break up reflection off of the rear wall since it is an imposing structure with numerous angles, shapes, and materials.
As far as disturbing the fish, keep in mind that sound is magnified under water so what might be 95 db to us might be a heck of a lot louder to the fish. We haven't seen a fish die from a loud thwack of a bass drum though. One problem that we do have is that the plexiglass is showing very small superficial cracks from the loud sound levels (at least according to the aquarium people). Their suggestion is to replace it with a glass tank (which we didn't do in the first place because of the unconventional stand it is on and they said plexiglass would work better).
As was mentioned earlier, saltwater aquariums are an eternal money pit and when you see a $1000 worth of fish floating at the top of the tank, you kick yourself for not buying more audio equipment instead of the fish. Oh well, but it looks nice...
As far as disturbing the fish, keep in mind that sound is magnified under water so what might be 95 db to us might be a heck of a lot louder to the fish. We haven't seen a fish die from a loud thwack of a bass drum though. One problem that we do have is that the plexiglass is showing very small superficial cracks from the loud sound levels (at least according to the aquarium people). Their suggestion is to replace it with a glass tank (which we didn't do in the first place because of the unconventional stand it is on and they said plexiglass would work better).
As was mentioned earlier, saltwater aquariums are an eternal money pit and when you see a $1000 worth of fish floating at the top of the tank, you kick yourself for not buying more audio equipment instead of the fish. Oh well, but it looks nice...