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Thread: Cal hypo feeders?

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    Question Cal hypo feeders?

    Moderator comment: 2 Threads merged together

    Hello folks. We are getting ready to drain our 5600 gallon tiled pool with an overload of cya. Once we rebalance the fresh water we want to find an automatic chlorine feeder solution that will allow us to keep low chlorine levels of 1 -2ppm, and not build up cya load. We have DE filter and 1hp pump. Appreciate any advice. Thank you.
    Ron (H2o) Burd

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    Re: Auto Chlorination Recommendations

    Welcome!

    There are many options for automatic chlorination systems. There are stenner pumps, something called the liquidator and Salt water generators (SWG). I'm sure there are many others, but those are the ones I see mentioned most.
    I personally have a SWG style unit. It uses salt from the water to create chlorine which then recombines back to salt.


    Please take a look at Pool School from the button up above. There is a bunch of good reading there and it explains a lot of what we are about.


    As far as the FC level you are interested in, TFP doesn't look at it that way. What we do is target a certain CYA level and that then dictates the FC level you need to maintain.

    Usually when we see somebody asking about low FC levels it comes from something they've either read or been told "That's all you need" this can't be any farther from the truth. The level you need, to have a clean and clear pool is directly related to the CYA level. Once you get that part figured out all the rest will kinda fall into place.


    Please feel free to ask any and all questions you may have. There are any number of folks around that will love to help you out.
    Bob - INTEX 12x24 owner (not setup yet), 'New to me' Kreepy Krauly Sand Shark, Test kit: TF-100 w/Speed Stir

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    Question Cal hypo feeders?

    We have recently drained our 5000 gal. pool due to extremely high CYA levels. To avoid repeating our problems with tricolor tabs and CYA build up, and we want to know if anyone has had a positive experience with cal hypo feeders. If so what make?

    Thank you.
    Ron (H2o) Burd

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    Mod Squad YippeeSkippy's Avatar
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    Re: Cal hypo feeders?

    I believe they are a different type of feeder and each type of solid chlorine (cya or calcium) requires its own type feeder.

    The problem with CalcHypo is that instead of getting too high CYA, you get too much Calcium. I guess if you can routinely drain your pool and start again.....<shrug>

    Yippee
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
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    Re: Cal hypo feeders?

    Don't mess with them. They are in LIMITED supply and only made by one company. My guess is they are pricey as well but I do not know that.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: Cal hypo feeders?

    Also, note that cal-hypo is explosive when exposed to other chems, including trichlor pucks. An entire ship blew up from a cal-hypo shipment gone wrong. So, handle with care. Like TNT.
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    Re: Cal hypo feeders?

    Quote Originally Posted by pooldv View Post
    Also, note that cal-hypo is explosive when exposed to other chems, including trichlor pucks. An entire ship blew up from a cal-hypo shipment gone wrong. So, handle with care. Like TNT.
    Where can I read about that?
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    Mod Squad pooldv's Avatar
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    Re: Cal hypo feeders?

    There's tons! Surprising they even make the stuff anymore.

    Other recent cargo explosions on container ships at sea include:
    2003 - SEA ELEGANCE involved an undeclared 20' container of calcium hypochlorite (UN 2208) that was stowed below decks aft of the accommodation.
    2002 - M/V HANJIN PENNSYLVANIA off Sri Lanka suffered two fatalities from the initial explosion in Hold 4 where no Dangerous Goods (DG) were declared. The fire spread for the next 4 days to Hold 6, also where no declared DG were stowed, where there was a a massive explosion resulting in a $235 million loss.
    1999 - CMA DJAKARTA off Egypt had a container of Chinese calcium hypochlorite (UN 2208) stowed above decks ignite and explode.
    1998 - ACONCAGUA off of Ecuador experienced an explosion of Chinese calcium hypochlorite (UN 1748) in a hold .
    1998 - SEA LAND MARINER sailing off of Crete suffered two fatalities in an explosion and fire of containers on the poop deck. Calcium hypochlorite was suspected.
    1998 - M/V DG HARMONY off South America involved the auto ignition and explosion of ten containers of US manufactured calcium hypochlorite stowed in Hold 3.

    Carriage of calcium hypochlorite still poses a risk to ships

    Maersk bans calcium hypochlorite shipments | News | American Shipper
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    Re: Cal hypo feeders?

    You can read about it here, In re M/V DG Harmony

    but this is the highlight:
    On a voyage from U.S. ports to Brazil, the M/V DG Harmony carried among its cargo ten containers of Calcium Hypochlorite. During the voyage, this product, which is commonly used as a bactericide, began to decompose, generating heat and smoke. The rise in temperature caused further decomposition, which ultimately caused the relatively unstable chemical to explode, blowing the doors off the containers, embedding them into the adjacent containers, and causing a fire so immense that the crew was forced to abandon ship after a grueling eighteen-hour unsuccessful attempt to stifle it. The fire lasted three weeks and, as a result, the US$16 million vessel was declared a constructive total loss and virtually all her cargo was destroyed.
    Maersk Line refuses to carry it anymore Maersk bans calcium hypochlorite shipments | News | American Shipper
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    Re: Cal hypo feeders?

    Quote Originally Posted by H2Oburd View Post
    Moderator comment: 2 Threads merged together

    Hello folks. We are getting ready to drain our 5600 gallon tiled pool with an overload of cya. Once we rebalance the fresh water we want to find an automatic chlorine feeder solution that will allow us to keep low chlorine levels of 1 -2ppm, and not build up cya load. We have DE filter and 1hp pump. Appreciate any advice. Thank you.
    Hey H20 - you can add your pool info in your signature which will help people know what equipment you are working with. What type of pool do you have? Plaster, Vinyl? The biggest problem with Cal Hypo is that you are increasing CH and eventually you will have to drain like Yippee Skippy said. We here recommend using liquid bleach and get away from the hard powder stuff which eventually you will have to drain.
    36,000 gallon IG Gunite (40 x 20), 1.5 HP Hayward pump, Pentair Nautilus NS-48 DE filter, 2 skimmers, 12 - (2 x 20) Fafco Solar Panels (Goldline controller not hooked up yet), Hayward Swimpure Plus SWG, Blue Pearl Robot cleaner. New Dr. Wellness X-12 standalone Lifestyle Spa.

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    Re: Cal hypo feeders?

    Liquid Chlorine Bleach is readily available in small bulk, fresh, and at good prices in many areas of FL. That would be my suggestion. No worries with side effects and just control your own Cya.
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    Re: Cal hypo feeders?

    Quote Originally Posted by pooldv View Post
    Also, note that cal-hypo is explosive when exposed to other chems, including trichlor pucks. An entire ship blew up from a cal-hypo shipment gone wrong. So, handle with care. Like TNT.

    Does this mean the bucket of Cal-hypo packets shouldn't be stored on top of the bucket of pucks like the PB stacked them?
    Dig started Feb 4th, 2017. Approx 10K - 12K Gal., IG, Free Form, Gunite, Moss Rock, Pea Gravel, 9x7 Level Spa. Jandy E-Pump, Jandy CV Filter, Aqualink PDA, Polaris 280 Cleaner, Rainbow 320 Chlorine Feeder, Jandy LED Lights, Jandy JXi 400 BTU Heater, Polaris QT Blower, Blue Surf Pebble Sheen with "Shimmering Sea". Pool Build Thread - Howdy

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    Mod Squad YippeeSkippy's Avatar
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    Re: Cal hypo feeders?

    Quote Originally Posted by SCB View Post
    Does this mean the bucket of Cal-hypo packets shouldn't be stored on top of the bucket of pucks like the PB stacked them?
    oh yeahhhhhh.... take them and separate them. They don't play nice together. Time out for both of them!

    Yippee
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Skippy's Pool Cooler --> Skippy's New Fountain Our Build --> Our Pool Solved Our Sloping Yard

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