I have a Century model 100, that had the fluid level down about an inch below the bottom of the cap. I had a smaller 32 oz lamp that has lava that doesn't really motivate real well, only bubles up about half way.......So I added fluid from that bottle to the centurys bottle bringing the fluid level up to just under a quarter of an inch to the bottom of the cap. The fluid in both bottles smelled the same and were the same color. Still, now I feel as though I might have goofed real bad, not knowing what the hell I was doing. When I unthreaded the big Centuries cap, a piece of paper staing Model 100 October 66 fell out. Also, the other little bottles rubber seal make a psst, sound upon peeling it off. Did I do something really bad here?