I am looking to find a small hydrometer. Years ago I had a small glass one that was around half the size of the normal glass ones that everyone sells. It was handy for quick checks. I have searched all over online but can't seem to find one now. With the standard one I loose quite a bit out of a gallon jar every time I take a sample to check. I know a refractometer can be used to some extent but the wizardry involved is probably not worth it.