CCreek....I had to get the 18 incher for our overflow pipe as I was advised grass carp would follow moving water and I didn't want to lose any of the ones just stocked with all the rain we had here this spring. Going to buy one for an 8 inch overflow at another pond we are trying to manage as well.

It works well so far, is built sturdy and hasn't had a problem getting clogged with trash. I am sure I will need to pull it and clean it from time to time, especially in the spring, but doesn't seem like it will be too much of a hassle. It pops in and out easily. BM61.