I own a few commercial properties and bought what I think is a pretty good pump and motor. We used it yesterday and it worked pretty well. I spent quite a bit of time mixing a 200 gallon tank that had about 100 gallons of material left over from about two months ago from the guy I bought it of. When it got the last 30 gallons or so I noticed that the remaining material was clumpy. I was wondering if I should remove this before I get more material or will this mix into the new material if I spend some time on it. I am getting the same material as the previous owner. I know that is should be diluted 1/3 water to 2/3 material (at least this is what I was told). Any help greatly appreciated.