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  1. AlanH

    Hayward Swimpro Pump - not in Hayward product list?

    Looks like I'm going to have to replace my Dynamo 1HP, 2 speed pump. Everything electrical is good but the motor housing, end plates and base plate are badly corroded to the point of splitting apart. The pump was run on low speed (about 3 amps) 95% of the time and had a minimal impact on our...
  2. AlanH

    Mustard Algae Slam - but no FAS-DPD test available

    Hopefully I can get some thoughts about slamming a budding mustard algae bloom in my pool. The hurdle is that I live in Nicaragua and there is no way I can do (or buy) a FAS-DPD test. The best I have is Pentair's Pro 11 test kit. It uses tablets to test for free chlorine (DPD1) and, using that...
  3. AlanH

    Custom, Buried AGP - Liner Installation ?s

    This is my first pool (a DIYer) and I'll be building it using an "unusual" type of wall construction that would allow me to use an stock AGP liner. This is because I have to work with a rather limited selection of materials available for pool construction in the country in which I live...
  4. AlanH

    Help Finding a Wall Return for Concrete Pool w/ Vinyl Liner

    I'm working on a first time build of a concrete (actually ferrocement) shell pool with a vinyl liner. I'm having a bit of difficulty finding a wall return fitting for this type of construction. It's probably only difficult because the product descriptions, photos/diagrams and installation...
  5. AlanH

    Pump Selection for a Small but Unusual Pool

    Hi all, After a somewhat (very?) confusing series of chats with Pentair I would appreciate your thoughts, advice and comments regarding the selection of a pool pump based on the attached diagram and the following specs. Pool Specs: -basically two AGPs: one oval (the "shallow end") "joined"...
  6. AlanH

    PVC Membrane Liners - Site-installed

    Is there a difference between the PVC membrane used for roofing and the PVC membrane used for site-installed liners in swimming pools? At a superficial level both are 60 mil (1.5mm) thick (other thicknesses available), have a polyester (or fiberglass) scrim/mesh sandwiched into it, and are...
  7. AlanH

    Help with water circulation diagrams

    I'd appreciate your thoughts and comments on the circulation diagrams in the attached file. I drew them purely on intuition and would like to know if they are "correct" or if I've really bungled them. Since this is not your normal pool, some background info: 1.The pool will have a perimeter...
  8. AlanH

    Variable Speed Pumps - Cheaper? Better? Alternatives

    I've been looking at pumps for our DIY build. An energy efficient pump is especially important since we have a battery backup system (power cuts up to 3-4 days) and will be installing a larger, totally off-grid system in the near future. (Unreliable power at $0.25/KwH the main reason). Without...
  9. AlanH

    Negative Perimeter Edge - calculating flow rates

    I need some help with a calculation (and "informed guesses" based on experience also welcome), that I believe is essential for specing a pump (or pumps) for my pool. So far everything I've been able to find is very anecdotal and I would appreciate a better understanding of the "background...
  10. AlanH

    DIY Pool Build - Latin Latitudes - In Ground, Vinyl Lined, Perimeter Wet Edge

    NOTE: It's been three years since my original postings outlining our plans for a swimming pool. The pool is finished and since we now have an internet link at home I can upload photos and captions of the build. Posts 1 through 19 are from three years ago that set the ball rolling. The build...
  11. AlanH

    AlanH - DIY build in Nicaragua

    Hi all. Came across TFP a while back when I started to think about a pool. The site has been a great help in getting started. Thanks to all contributors. My wife and I retired to Nicaragua's south Pacific coast about 10 years ago. As great as the beach is a fresh water pool only a few steps...