I just started brewing on a 10 gallon system, each time (3 batches) I have ended up with very cloudy beers. I mash in a 10 gallon Rubbermaid with false bottom and I have been mashing for a long time to make sure I get full conversion. I have used 2 varieties of American ale and a northwest ale yeast. I have also let the beers sit in the fridge for at least 3 weeks before jumping to conclusions. Any ideas?