After many years of extract brewing thought I'd explore all grain. Bought an Anvil Foundry system and tried it today for first all grain. Bought a kit for Morebeer so would assume fermentables were correctly calculated. Started with 6 gal of water for mash. When mash and sparge complete, brought it up to boil where I had a creamy head with gray strips thoughout the head. SG quite low. I know I used way too much water, but what was this