This is my first attempt at harvesting yeast from the fermentor. I followed instruction poured in a bunch of cool boiled water, shook it up, let it settle for a few minutes, then poured out into a large jar. I had to leave so I put that in the fridge planning to do the next washing step later. The picture below is what I ended up with. I tried shaking it up again, but still didn't notice any clear yeast/trub delineation like the examples I have seen. Did I just get all trub and hardly any yeast?