So I just installed a ball valve and pick up tube on my kettle and had a first run today on a pale ale I brewed. I thought having the pickup tube would help eliminate some trub and gunk getting into the fermentor. I cooled it down to 70 and then stirred it to try and get a whirlpool going, put the lid on and let it sit for about 25 mins. I went to start draining it and as it got towards the end there was no cone of trub in the middle, it was still all spread out on the bottom and I got a ton of gunk in the fermentor. How do you properly whirlpool without having a pump and some sort of recirculator?