Well, putting the TetraTec in the flower pot did not work out: husband decided it was still too loud.
I ordered a Rena 100 and it came today
and even though it seems very quiet to me
I went ahead and crafted a sound-proof container for it, following a hint posted here by rodney10954 over in the newbie forum:
I used a glass jar with a metal lid (holes cut for power cord, air tubing & a drinking straw air inlet) and padded it inside & out with small square pieces of foam.
I set this all up while husband was out & left it running. After he'd been home for about an hour he said, "So how's the new pump?"
"You tell me," I said.
He's trying to decide now; he says he'll let me know later. I think it will be OK, 'cause I can't hear it at all.
*crosses fingers*

I ordered a Rena 100 and it came today


http://www.rcarchive.com/fish/air.html
Check this out
i haven't tried it but it looks like it would work
I used a glass jar with a metal lid (holes cut for power cord, air tubing & a drinking straw air inlet) and padded it inside & out with small square pieces of foam.
I set this all up while husband was out & left it running. After he'd been home for about an hour he said, "So how's the new pump?"
"You tell me," I said.

He's trying to decide now; he says he'll let me know later. I think it will be OK, 'cause I can't hear it at all.
*crosses fingers*