I started a 5 gal batch of cyser on 1/01, og of 1.111. Now the sg is 1.003, and getting one bubble a minute. Is this the time to rack? The cyser is fairly opaque. When siphoning, how do you know when to stop, not leaving too much which will be thrown away, and too little which will mix some of the bottom gunk(what's the good word for that?) into the cyser.