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Thread: Tablets vs. Granular chlorine

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    Join Date
    Nov 2015
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    Montana
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    Question Tablets vs. Granular chlorine

    New to using chlorine, looking online and right now we have Spa Guard granular Chlorine Concentrate.

    What's the benefits of the granular vs tablets, I know ones "diclor" and "Trichlor"

    I know a lot of people don't recommend trichlor - (tablets) --why???

    Thanks
    2013 Hot Spring Spas High life Grandee

    500 Gallons

    ACE Saltwater sanitizing system (Currently non functioning)

  2. Back To Top    #2
    Mod Squad tim5055's Avatar
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    Re: Tablets vs. Granular chlorine

    Welcome to TFP!!

    Have you checked out "How to use Chlorine in my Spa"
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    JoyfulNoise's Avatar
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    Re: Tablets vs. Granular chlorine

    If you follow the sticky that tim5055 posted, then you can successfully use dichlor-then-bleach. You want to avoid the long term use of any solid forms of chlorine as they will build up unwanted chemicals (either CYA or calcium) in your water. Since this is a spa, sole use of dichlor will lead to excessive CYA build up which will make the spa water unmanageable and lead to excessive water replacement.

    Dichlor is preferred over trichlor because trichlor is very acidic and it dissolves more rapidly than dichlor does. This can lead to fast increases in FC levels. The excess of acidity of trichlor will lower your pH to levels that can damage your new spa and the acidity consumes TA (total alkalinity). If the TA bottoms out to 0ppm, your pH can crash to very low levels.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Join Date
    Nov 2015
    Location
    Montana
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    Re: Tablets vs. Granular chlorine

    yea I read the sticky, wife does not like the idea of pouring bleach in our High dollar hot tub, she just insists on using a chlorine specifically for hot tubs..... she's 6 months pregnant so there's no arguing with here at this point lol (trust me I've tried)

    I also have spa guard enhanced shock, it has a less chlorine content and "other ingredients"

    I really wish our ACE system was functioning .....


    Also on a side note:

    has anyone tried one of these??

    http://www.amazon.com/gp/product/B00...=welofothla-20
    2013 Hot Spring Spas High life Grandee

    500 Gallons

    ACE Saltwater sanitizing system (Currently non functioning)

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    Mod Squad JVTrain's Avatar
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    Re: Tablets vs. Granular chlorine

    Do a search for Nature2 on this site and find out the opinions... They're not terrible for spas but really not necessary. It's a product that adds metals to your water (copper, silver ions). Can lead to staining of blonde hair depending on levels.

    I realize the situation with a significant other being resistant to these ideas. But there are thousands of users on this site, including myself, who use exclusively bleach after the dichlor start up in their spas. The science is valid. The experiences here are valid. If you were to continue to use dichlor, your CYA will become elevated to the point of making the chlorine not effective anymore, then you'd have to drain and refill. If you add one ounce of dichlor every 3 days, starting with 0 CYA, you'd be at 76 ppm after a month. 152 after two months and at this point or sooner, you'd likely have a spa that was turning foul because the FC level is not sufficient for sanitation at this elevated CYA. This is a low estimate on how much dichlor you would need, which largely depends on how much you use the tub. You'll never have this problem with bleach.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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