I used Coopers wheat ale liquid extract. Dissolved it in 2 litres boiling water with 500g light malt extract and 300g dextrose. Put it into the carbuoy with enough cold water to equal just under 5 gallons. I forgot to pitch the yeast, but it seems to be doing fine nonetheless. Today is day 2, and the fermentation is very vigorous, and the brew has a nice, hazy yellow/orange colour.