Any ideas on how to make a water fall weir?
I have a koi pond and I want to fix my waterfall with 4 or 5 weirs but my budget is tight and I can't afford to buy them. My pond sit at the base of a hill and I have a very strong pump to move the water so that isn't an issue. I just want to add more drama to the waterfall and the only way that I can think of doing it is by installing weirs. Any suggestions?