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Thread: I'm guessing that Cal-Hypo may be good for me

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    I'm guessing that Cal-Hypo may be good for me

    I'm guessing that Cal-Hypo may be good for me since my CH has come down to 100 for some reason.
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    Re: Why do you never recommend Cal-Hypo?

    This is an old Post, but I didn't want to start a new one just for this question.
    Can you use Cal Hypo Tabs in a Rainbow 300 Inline Chlorinator?
    It seems I read somewhere that Cal Hypo Tabs get messy & gooey.
    Thanks.
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    linen's Avatar
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    Re: Why do you never recommend Cal-Hypo?

    Quote Originally Posted by dino1956
    This is an old Post, but I didn't want to start a new one just for this question.
    Can you use Cal Hypo Tabs in a Rainbow 300 Inline Chlorinator?
    It seems I read somewhere that Cal Hypo Tabs get messy & gooey.
    Thanks.
    You should never put cal-hypo in a trichlor feeder, even if it is empty

    Also, cal-hypo dissolves much faster than trichlor tabs, so a different feeder design is needed.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Why do you never recommend Cal-Hypo?

    That's the answer I was looking for. Thank you.
    20' X 40' Rectangular Gunite Pool with Spa
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    Re: Why do you never recommend Cal-Hypo?

    I fought off the urge to ask about using Cal-Hypo, searched the site and found this thread. In my case I could have used Cal-Hypo off and on with my bleach and raised my CH without buying CH increaser. I have a vinyl pool liner and shouldn't worry about it anyway but my CH was 30 and I don't feel comfortable with it being that low. I will carefully start using Cal-Hypo in conjunction with my bleach and continue to keep a close watch on my tests. In south Mississippi we have plenty of evaporation and rain to help keep the CH down. As has been said many times already on this thread, the main thing is to understand what is happening with the chemicals in your pool. Thanks to TFP and my TFP test kit, this is my second year to open the pool and be pristine and swimmable in 2-3 days.
    18' x 36', 25,000 gallon IG with vinyl liner, sand filter and 3/4 hp pump

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    Re: Why do you never recommend Cal-Hypo?

    Since Cal-Hypo does not completely dissolve instantly, be sure to lightly brush the area of the pool (usually in front of a return flow) where you add it so as to ensure thorough mixing. You don't want particles of it sitting on the bottom of your vinyl pool (though it's not as bad as having Trichlor sit on the bottom with its acidity). Or you can try to pre-dissolve it in a bucket of water though that may take multiple times as it can get saturated.
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    Isaac-1's Avatar
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    Re: Why do you never recommend Cal-Hypo?

    I have low CH fill water here (around 30ppm) and could get away with using Cal-Hypo some of the time, but I choose not to based on safety issues, as I do keep trichlor and dichlor on hand for occasional CYA tweaking. Rather than worry about the potential for Cal-Hypo to be accidentally mixed with these perhaps causing a fire or explosion, I simply avoid ever having Cal-Hypo on site.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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    Re: Why do you never recommend Cal-Hypo?

    I got rid of all my Tabs. I'm strictly using Bleach & Liquid Chlorine, due to a high CYA caused by years of Tabs.
    There is a Cal-Hypo Product called Shockwave that has 72% Available Chlorine.
    I saw someone add it to the skimmer & he claims because of it's PH, it won't hurt equipment & it can be added in that manner.
    Do you guys agree? Otherwise I'll mix it in a Bucket with Water.
    I may get some to keep around, in case my Shock with Chlorine, tends to need a lot more gallons.
    I just added almost 20 LBs. Of Calcium Chloride.
    And I'm just about at 300 CH, after adding. Was at 100. I have Plaster Pool.
    Had I known about Cal Hypo adding Calcium, I may have went that route to both Shock & get CH to go up.
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    Richard320's Avatar
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    Re: Why do you never recommend Cal-Hypo?

    Generally, we don't advocate dumping anything in the skimmer. It could clump up in an elbow or at a valve and cause flow problems. And if you need to backwash, who knows how much of whatever remains undissolved in there that's going out the waste pipe?

    Scoop out a bucket of pool water, add your powder and give it a mix and pour it in front of a return. Rinse the bucket. Sweep any undissolved powder drifts. Done. Two minutes.
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    Re: Why do you never recommend Cal-Hypo?

    That's why I asked. Richard, your the best!

    A bit off topic, but I found Liquid Chlorine at ACE Hardware. They sell it out of a huge Tower & put it in 2.5 Gallon Buckets.
    First time you buy they charge your for container. Comes to $14.
    For Refills after that it's $5.00
    They say it's 12% Chlorine.
    But I did some research & went to another ACE Hardware & they said their's was 10%. Same Tower.
    I think it's all 10% & my store is trying to impress customers.
    20' X 40' Rectangular Gunite Pool with Spa
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    Re: Why do you never recommend Cal-Hypo?

    One more question! (Last Famous Words
    One Treatment of 3 -1LB Bags of Cal-Hypo in a 28.000 Gallon Pool To Shock.
    How much will that raise my Calcium Number? Just a guestimate, if you will.
    20' X 40' Rectangular Gunite Pool with Spa
    28,000 Gallons
    Sand Filter
    Rainbow Chlorinator
    Penair Pump
    Polaris 280

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    Isaac-1's Avatar
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    Re: I'm guessing that Cal-Hypo may be good for me

    Depends on the strength of the cal-hypo but in the ballpark of 3-4ppm CH increase
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
    ~Remember TFP counts on your donations to keep this site ad free~

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    Re: I'm guessing that Cal-Hypo may be good for me

    A rough rule of thumb is that for every 10 ppm Free Chlorine (FC) added by Cal-Hypo, it will increase Calcium Hardness (CH) by at least 7 ppm. This rule is more or less independent of concentration of product.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
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