Hi Mitten,
Nice pond. It's very much along the design lines that I am trying to implement. It looks like you have much of your filtration hidden behind (about 3 ft?) a decorative waterfall wall.
Unfortunately, due to set back and access requirements, I don't have 3' behind the pond to extend the filtration bay into. I tried to push the filtration bay "into" the pond, but that didn't look very good, from a proportional standpoint. I'm hoping that cantilevering the filtration/falls over the pond won't be too cost prohibative. Otherwise, I may have to go back to a pressurized set up, a little further away from the pond.
Can you tell me if, in your opinion, my concerns/assumptions are valid and worth pursuing? Or, am I getting a little too paranoid about the issues that I have identified and I should just get on with finalizing the design and move into the construction phase? I want to try to do this once (at least for this pond) as opposed to trying to "fix" mistakes and oversights after the pond is in.