I do also. I have tried waterfall features many times now, and they always end up failing. Too much flow, too little flow, clogged pumps, water diverted incorrectly leading to soggy substrate, etc etc etc. The last one I tried failed the first try, I didn't even bother trying to fix and correct it, I just gave up! Both of my tanks have a pond with a submersible filter now. Maybe I'll try again someday.