I just saw those watts pressure regulators somewhere today! I might try them.
Hoppy, thanks for the offer to test that for me. I think I can do the test myself. (thanks for the idea!)
I think my shower valve keeps a consistant pressure. It's new, and was fairly expensive. I don't think I have valves on the water lines going to the shower. Maybe I could turn down the pressure to the entire house and try it.
Now I just have to figure out where to drain it.. The aquarium is nowhwere near my plumbing stack.. or any drains. It is up against a wall w/ the garage on the other side. I already have plumbing running to the garage where I have my external pumps (this way I dont hear them). I also do my water changes out there. (keeps the girlfriend happy)
I thought about draining it into the yard/garden, but it freezes here for a lot of the winter. My other idea was to bury a perforated pipe down below the freeze depth, like a super small septic field, but that would be a lot of work. Probably more trouble than to keep doing water changes.
Drilling through the floor and running a drain to the stack is not an option. I recently put in new hardwood floors.