Because I haven't had enough time to post and get engaged in conversations here, I don't have enough posts to reply to a thread that is in "tanks". However, for any users that might be experiencing a leaking Vivi-Nova, I found an inexpensive fix for a couple of mine. I have about 4 or 5 Vivi-Nova tanks, and they were working fine in the beginning, and then all of a sudden developed leaks from the bottom. I found that the ones that I had didn't have an o-ring on the bottom, but did on the top 
I was getting ready to head out to the hardware store and pick up some o-rings, when I looked into my son's room and noticed that it was a mess! That part isn't important, but the part that was important was the box of rubber bands that he uses on his braces. I took a look at them and then realized that just beyond the mess was the answer I was looking for. The rubber bands fit perfectly on the threading that fits inside the tank!
Just thought I would share it before I forgot it before I made it up to 5 posts...I'm sure someone using their search feature will find it here...
I was getting ready to head out to the hardware store and pick up some o-rings, when I looked into my son's room and noticed that it was a mess! That part isn't important, but the part that was important was the box of rubber bands that he uses on his braces. I took a look at them and then realized that just beyond the mess was the answer I was looking for. The rubber bands fit perfectly on the threading that fits inside the tank!Just thought I would share it before I forgot it before I made it up to 5 posts...I'm sure someone using their search feature will find it here...
