Stereo and Fish tanks - noisy need help

Yes, I've had a tank for ages, although it's only a 40 gallon; it has an air pump and filter. I place these plastic bags from the grocery store with a little air in them under the pump to absorb vibration and the filter is a "Whisper filter". After some experimentation you'll work it out.

There is nothing better than an aquarium and beautiful music.

Runmeshaw does, but I don't see any filters running

http://forum.audiogon.com/cgi-bin/fr.pl?vbudg&1289592220&read&3&zzlRunmeshaw&&

I only have a 75 gallon tank in my listening room, but it's dead quiet with the Eheim canister filter I use. Not sure if Eheim makes canister filters large enough for a tank as large as yours, but maybe Johnsonwu can speak to that.

I had a 200 gal Saltwater tank.
I made an overflow that had about 2-3 1" tubing that drained to my to my basement.
From the basement I did all the filteration, areation, heating, bifiltering, skimming etc.
The water from the upstairs tank drained into 2 PVC tubs that held about 30 gallons each. Each tub was plumbed to each other. From there I ran the tank water over Bio media with air pumping through the bio media. I had a huge Protein skimmer that cleaned the water in the tubs and submersible heaters.
From there I had I think it was, a little giant saltwater tank that pumped about 800 gallons per hour. The return went into the upstairs tank via a 1" tubing and with a 90 degree elbow spliiled into the tank. the tank was fitting with a fairly tight glass with just one end open for the overflow, tubing etc.
It was quite quiet.
A freshwater tank would be even easier to set up.

Agreed, a canister type of filter like Eheim can be very quiet if maintained.
Also under gravel filters depending on how the tube feed is supplied.
I didn't see any mention of what you're using.
Fresh or saltwater? My big salt water tank was dead quiet. And went on for years and years til I moved...
Good luck... Easy to sort.