Mike T
You're absolutely correct!! Just because you have a contractors license to be a landscaper doesn't necessarily mean you can't or don't know how to build a "proper" koi pond. Here in California, you're supposed to have a Landscape Contractor's license to be able to build ponds. Does that mean that ALL landscapers are bad pond builders? NO! It only means that the ones who don't wish to take the time to learn something different or new are the problems. It shouldn't be a "hit and run" business, but all too often people are taken advantage of by the opportunist who sees the chance to make a "quick buck" from the ignorant. I blame both the client and the builder. Both are equally responsible for these failed "koi ponds". DO YOUR HOMEWORK FOLKS - or find a reputable builder through word of mouth advertising. It's the best way!!
Mike