Hi all, I'm Dave and after moving house i found my neighbours dabbled in a bit of home brewing and quickly took it up myself (love it). ive made some beer and cider and started on some wines, so far all from kits, but after reading around and spotting 5 litres of fruit juice carelessly left on the side by the wife that had no preservatives in it... i thought... it should work, and threw 3 litres into my 5 litre demijohn that was sat doing nothing and calculated the amount of sugar required. Turned out there was enough in the juice alone to start with and i can add to it later (or at least im lead to believe) however after 1 day i woke up and had a look and its now got what i can only describe as about an inch thick layer of spongy stuff (?) on top of it. I was meticulous in sterilising everything so i dont believe it can be an infection and there is plenty of activity in the airlock, i just cant seem to find anywhere that can tell me what it is or what i do about it.... Is it fine in there and i just disturb it now and then? do i leave it as it is... not a clue... if it helps the juice was some tesco 100% pressed apple, peach, mango and passion fruit (i couldnt resist trying to ferment it, just sounded too good in my head) the only ingredient bar the fruit juice is ascorbic acid which as far as i read was not a problem. Sorry for the essay trying to be thorough... Anyone have any information on this?