Okay so I somehow lost the O-rings for my Arctic Turbo tank. I've tried to find new ones on the Horizontech site to no avail. And so after doing some research, I ordered O-rings for the Kangertech Subtank as it also has a 22 mm diameter, figuring that I could just stretch it if it doesn't fit. Well I've been working with it and while the small white O-ring appears to fit okay on the top of the tank if I don't tighten it too much, I can't seem to get anything to fit right on the bottom. Now I really like this tank and I'm precariously close to just ordering a new one, although that seems a not excessive since I'm only missing two small silicone O-rings here. Any suggestions?