Chris:
If you use metal Stainless Steel Bins directly over the ponds you'll have the loudest installation...hard to hear others speaking...like being next to a mill spillway with torrents of water...
If you use plastic bins in a hollow tile enclosure faced with sound deading material, in my case, a sheet of Matala Mat...with the water falling onto a concrete tray or Aluminum Basin you won't hear much more than a trickle...
I beleive the recommended volume for Bac House Media is 2 Kilos/1000 gallons of water to be filtered...Ask vendor to ship via: US Postal Service Parcel Post or Priority Mail...Cost $30 from Naples Florida to Hawaii, which is about as far as you can go...
Hope this helps... Aloha! Mike
For my civil servant friend, was hoping to see you at today's meet so I could tell you in person, for about the 100th time, TT don't make noise...TT's aren't Bakki Showers...And koi aren't lathargic that's how they swim, If you want torrents of current and fish fighting the currents, you may want to raise salmon...
