That's fixed it. Thanks mate. I was wondering where all the water was going. 0.4 litres is much more respectable and I don't need a bigger kettle either.

This is my first time using the desktop version of BF and I'm brewing an American IPA in my 30L/8 gal setup. the BF calculator says I'm going to lose 12 litres (3 gal) of wort to the hops. I'm only using 80g (3 oz) of pellet hops so this seems massively excessive. Can any of you kind people...