this is just an observation, not a criticism...i wouldnt have used the large pipe. it really cuts into the filters capacity. especially because of its size, having to mount it so low on the tank...for instance,its like a 100 gal stocktank only using 40 gals of volume. a couple of 2" pipes would have fit right up near the brim. or better yet a weir.. my filter has a weir and utilizes almost the entire stocktank, up to 2" from the top of the brim.. if thats a 100 gal tank, my 70 gal tank is actually utilizing far more tank volume. essentually making it a bigger filter in a smaller container.