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Message: [QUOTE="GBBUDD, post: 481912, member: 10026"] The gazebo base is more than likely a 4" concrete pad and will hold just about anything you throw at it Now occasionally pool companies will opt for less concrete thickness and go with a higher strength yes thinner pour DIG ON THE OUTSIDE OF THE EDGING AT SEE WHAT YOU HAVE. The pool pump is not designed to run 24/7 it is more of an 8 hour run time. if you use it you'll get the last bit of life from it so why not but i would leave what ever filter system you had up and running. in addition to making a bog. you have a great deal of water and for 30,000 gallons and a heavily used swim pond the recommended size of a bog is up to 50% of the pool surface area. I strong advise watching the multitude of videos that Modern design aquascaping has he just about covers it all and you will understand in simple terms the entire idea . I would go with a second pump hidden behind the bog. but you'll want to keep the pump as close to the water level as possible. External pumps are great at pushing pater not pulling. And in my book submersible pumps are Not ideal for a swim pond even if they are in a pump vault you still have electrical power in the water. With externals you do not. Yes there are gfi's but i'd rather not rely on it and prefer not having the electric in the water . they do go bad over time, and are recommended be replace every so often. [MEDIA=youtube]EpWPldQeHDI[/MEDIA] So if your set of the bog on the gazebo i would go with concrete block cheap easy and does not rot . you can easily pin the wall into the deck but i would still go with a liner inside of the block frame for ease and reliable. To skim coat the walls with fiberglass, water proof paint or plaster is not what i would recommend doing for the beginner and then throw 10's of thousands pounds of stone into the area hoping there's no leak. and that you have a bod that will last for decades. In the drawing the tan is the bog inside the new cinderblock walls with rebar pins. The rubber is the black line. ALL ONE PIECE TO THE POOL. THE BLUE THICK LINE WOULD BE LIKE A BLUE STONE CAP Where you have a very formal pool I would use a lot of stacked stone walls as well as some boulders. Build the concrete bog wall say two feet tall for a peastone bog . have the rubber epdm/ "my choice" be one piece where it is in the new bog area and is draped over the top of the new concrete wall down to a shelf or have two shelves one being from the gazebo deck and the other the pool deck. run the liner down the pool deck and have it drape into the pool this way any water from the spill ways falls or stream is on a large waterproof area and can only drain into the pool . The height youll have will be fantastic for a dramatic waterfall but the higher it gets the more it drops the more the splash will shoot out and will need a wider catch area or measures to stop it from getting outside the liner. That is not all that hard to do just have the falls in the shape of a U WITH THE FALLS BEING AT THE BOOTOM OF THE U AND THE SIDES protruding outward to catch the splash that wants to go out to the sides. I would also place the external pump off to the right side of the gazebo behind it's own staked slate wall on the opposite side of the stairs. The idea of a second pump will save a lot of energy bill as pushing from close to the house all the way down to the bog is a good distance and back pressure. it will save you from . Digging out the yard running a new line all the way from the pump to the gazebo or if your able to find the return line outside the pool decking tapping into that line will not give you enough size and flow as they are usually only 1 1/2" or 2" lines good for only 4000 gph you'll want a minimum of 4000. A new pump you'll be able to split the power so the bog bhas a good flow but you can add other gph just to the waterfall [ATTACH type="full"]147227[/ATTACH] ou can have multiple spill ways if you so liked if you want a sheet flow and formal or [/QUOTE]

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