That's it. Thanks Aaron. I've decided I'll prime with it. I've had a bit of a hunt, but can't find out the quantity to use. I reckon the 250 ml bottle would be about right. Don't know if I'll just tip it in or boil in some water yet.
Anyway, I've just racked the only beer I have fermenting, so I'm PATIENTLY waiting for another week and a half. Should be a nice beer though. It's a Coopers Sparkling + 1.25kg extract + 500g crystal + 500g dextrose + 20g Saaz + 30g Cascade(dry). Started 1061, today 1015. Tastes OK so far. Wait til it gets that ol' tree sap into it. I'll have to make some pancakes.
The OG was a bit higher than you'd expect, but I have a new fangled 30 lt fermenter from Liquorcraft, and the measurements are 5 lt apart, and I sorta guessed. After racking, I find that I only have 21.5 lt, and I put about a half pint hop tea in.
Them fermenters are the tall slim ones, but have a different (wider and more abrupt) thread. The lid has a handle across the indented top. A bit jerkier to tighten, because it hasn't got the little grip ridges around it, and the handle being in the middle, doesn't allow enough leverage.