Just ordered some filter boards from TJs tackle . I am the type that will pull know punches i will give you a honest update when i get them. I tried coffee filters, tyvex , coffee and tyvex combined . I seem to alway get a little valcano action and when i turned air down was not getting fluid action like i wanted. TJs said should notice a difference, we will see hopefully by this weekend. They were not that expensive so if they work they will be worth it. I bought enough to do 6 cups , four 2" and two 3" and if they work out i plan on ordering more .