fishin4cars
True friends just call me Larkin
Whiskey, where is the bottom drain going? Is it for draining the pond or part of the filter? If your going to use it as part of your filter from everything I've read you don't want a belly or a hump in the drain line or your very likely to get air locked or clogged. The drain line should be level until the pipe starts to turn up then you should have a slow sweeping turn. I'm not real sure what your plans are but i have seen other builds where the builder had issues and thought I would throw the info out there for you just in case. Coming along nice! You've got your work cut out for you, be worth it in the end though!