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  1. SorensenR

    Using Caustic Soda to neutralize Cyanuric Acid

    Thanks for your kind comments. The youthful laughter is bound to continue for many years to come as we had a small "accident" during one of the national Covid lockdowns where we stayed 8 months in the cabin. There is after all a limit to how much Netflix a guy can watch.
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  4. SorensenR

    Using Caustic Soda to neutralize Cyanuric Acid

    I have monitored FC for the past 7 days and it is dropping 3 ppm/day. This is equivalent to 600 ml of 6% bleach, so I have installed a dosing pump to add 300 ml twice a day, 6 am/pm. I have a 12 gal reservoir, so that should last for just over 2 months usage. I guess the next thing to watch out...
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  8. SorensenR

    Using Caustic Soda to neutralize Cyanuric Acid

    The penny finally dropped for me as how to understand the CYA/chlorine equilibrium. Thanks guys. I did a 1:4 diluted test, which came out at 75 ppm cyanuric acid, so I am stuck with 300 ppm. Adding 3 litre of 6% bleach will give me +15 ppm FC or a total of 29 ppm FC. I will try to maintain FC at...
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  10. SorensenR

    Using Caustic Soda to neutralize Cyanuric Acid

    I am back on the island and have activated the K-2006 test kit. First off, I had to add 1,200 g (42 ounce) of caustic soda to get the pH back up to 7.2. My cyanuric acid level is approaching scary numbers around 250-300 ppm, but I am desperate short on water in the neutrino detector, so I can't...
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  13. SorensenR

    Using Caustic Soda to neutralize Cyanuric Acid

    Yep, but they are slipping through my filters. I am capturing rain from the back, front and part of the balcony roof. We get about 80" of rain here annually, with about half of that during a very intense monsoon season.
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  15. SorensenR

    Using Caustic Soda to neutralize Cyanuric Acid

    We are about to return to the house and I will start to install and test the bleach dosing pump, but since I am still short on rain water let me share a picture of my 10,000 gal holding tank.
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  18. SorensenR

    We Have a Winner! - Pool of the Month (March 2023); Theme - Scenic Views

    Let's try if this works: Priscilla Villa Koh Tao · Ko Tao, Ko Pha-ngan District, Surat Thani 84280, Thailand If not, look for the photos tab.
  19. SorensenR

    We Have a Winner! - Pool of the Month (March 2023); Theme - Scenic Views

    Thanks a lot for all your support, votes and likes. I am humbled that my little pool even qualify, let alone win 🏆 this amazing competition. What a welcome to a this fantastic forum. It is also great that International pools are recognized, it is a beautiful world out there. If any of you...
  20. SorensenR

    We Have a Winner! - Pool of the Month (March 2023); Theme - Scenic Views

    This little pool is sitting 500 ft on a jungle hill overlooking the ocean surrounding the island Koh Tao in Thailand. Thanks to members of this forum the water quality has dramatically improved.
  21. SorensenR

    Using Caustic Soda to neutralize Cyanuric Acid

    Thanks for the encouragement M88. I can't believe my tiny cyanuric acid saturated pool is worthy of any competition, but since this month's competition is about everything but the pool, I will thrown in a picture. This forum and community just get better and better. Thanks guys.
  22. SorensenR

    Using Caustic Soda to neutralize Cyanuric Acid

    The house have a 10,000 gal storage tank, which easily fills during our tropical monsoon rainy season. I capture and filter rain water through an elaborate filtration system and have an additional 20 micron filter on the house pump. I just siphon off the water in the pool with the 2" pool hose...
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  26. SorensenR

    Using Caustic Soda to neutralize Cyanuric Acid

    Thanks for your detailed description PS. We have a smaller rain season in May and if I get enough water, I will do a partial refill, get cyanuric acid in the 50 ppm range, switch to bleach and follow your guidelines. I have ordered the dosing pump and will use bleach for now. I can get it for...
  27. SorensenR

    Using Caustic Soda to neutralize Cyanuric Acid

    Quick question for M88. Do I need to run the MegaChlor unit on a timer to get the FC correct or is it on 24/7? Do I need a separate test kit or will my trusted K2006 kit do the job? I can get a digital salinity and float type hydrometer locally.
  28. SorensenR

    Using Caustic Soda to neutralize Cyanuric Acid

    It is a Desjoyaux GR.I 110 filter, using a 5 micron filter sock and rolling 18 m3/hour. Not great by any standard, but kind of OK.
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