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Thread: Trichlor Puck Senario

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    Mr. Blue's Avatar
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    Trichlor Puck Senario

    So, I was thinking about this and decided to see what you guys thought.

    If you were to use the trichlor pucks (in a floater) to maintain chlorine and use bleach to 'fine tune'/shock the pool. How much water would you need to replace a month (week?) to keep CYA levels in check? I know it could be a wide range, depending on the size of the pool and other chemical levels.

    Assuming that all other levels remain at/near goal levels, could this scenario work?
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    Re: Trichlor Puck Senario

    I do something similar. I have a rainbow feeder and only use 1-2 pucks per week starting in april and ending in September. the rest of the year I use bleach only. at the beginning of the april my cya is usually about 20-30 and by September it's about 90-100. using bleach only in the winter allows it to drop.

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    Re: Trichlor Puck Senario

    but yes, 1-2 pucks per week is not enough in the summer and I do supplement with bleach.

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    Re: Trichlor Puck Senario

    What kind of filter do you have?

    I'm also taking into account backwashing and vacuuming, both of which will result in replacing water.
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    Mr. Blue's Avatar
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    Re: Trichlor Puck Senario

    Also, what is the size of your pool?
    How much bleach do you usually go through in a given week?

    Curious, as you are 'right down the street' from me.
    23K Gallon Freeform Tile Inground
    Hayward Super II 1.5 HP -- Pentair FNSP48 DE Filter @ 120 GPM
    Polaris 3900 Sport (with Booster Pump)


    Pool School Attendee -- The TF-100 Test Kit and the Pool Calculator keep my pool Trouble Free -- BBB Supporter

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    Re: Trichlor Puck Senario

    cartridge filter, 22-23k gallon plaster. I have to pour in a half jug of the walmart great value bleach every couple days. I usually put 1 puck in on sunday and 1 on thursday. I don't keep everything perfect like some on this site, but I never get algae. sometimes I pour a whole bottle of bleach in to supplement.

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    Re: Trichlor Puck Senario

    I've only had my pool for 2 years so i'm still learning too, but this seems to be working for me so far.

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    Re: Trichlor Puck Senario

    You can use poolcalculator.com to figure out how much CYA each puck is adding to your pool. From there you can figure out a percentage of water replacement to lower CYA. I use pucks but I also vacuum to waste knowing full well to keep an eye on CYA.
    18x36 inground vinyl lined, Hayward sand filter and tablet chrolinator, approx 18k gallon

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    Mr. Blue's Avatar
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    Re: Trichlor Puck Senario

    Do you exclusivity use pucks?
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    Re: Trichlor Puck Senario

    Pucks only unless I need to raise to shock level which is bleach. The only way I can get away with it is because of vacuuming to waste and I have a very small leak. Even then by the end of the season my CYA is 60-70, I prefer 50 because of all day sun.

    Pucks aren't the ease some think, you still have to maintain your TA above 100 otherwise your pH will drop rapidly. And guess what happens when you're changing water to continually lower your CYA? Yep, TA goes with the water and you have to raise again. Not difficult, but it's not a "set it and forget it" thing. I am lucky in Louisville as we have very high quality water (some of the best in the nation actually) and it's relatively cheap.
    18x36 inground vinyl lined, Hayward sand filter and tablet chrolinator, approx 18k gallon

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    Mr. Blue's Avatar
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    Re: Trichlor Puck Senario

    I'm assuming that you vacuum quite a bit?

    Water is pretty cheap here as well, so I'm not worried about that. I guess I just need to keep and eye on it until I get the feel of the pool.
    23K Gallon Freeform Tile Inground
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    Re: Trichlor Puck Senario

    I have contemplated this too... But for the pro's here wouldn't the Liquidator suffice for ongoing chlorine similar to a 3" tab chlorinator w/o the negatives of the tabs?

    Are the 3" tabs cheaper than say Liquid chlorine in a 12.5% concentration at like $3 a gal? Not sure how to calulate
    18x37 Vinyl Grecian (24k gals) 8' Inter fab(la mesa) Diving board w/ waterfall & Led, Pentair Laminars & Intellibrite 5g

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    Re: Trichlor Puck Senario

    Mr Blue...We have similiar size pool and I calculated that 5# of tri chlor will raise our pool CYA by 14ppm....
    Not sure how long that 5# will last...maybe a month. SO each Month CYA will raise 14ppm ignoring water removal. So with your backwashing and vacuuming maybe only 10 at most?
    18x37 Vinyl Grecian (24k gals) 8' Inter fab(la mesa) Diving board w/ waterfall & Led, Pentair Laminars & Intellibrite 5g

    Star Rite System 3 Cartridge Filter, IntelliPro 3HP Variable Spd Pump, Max E Therm 400k BTU,
    Pentair Easy Touch 8 & actuators,...Now looking to BBB

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    Re: Trichlor Puck Senario

    Bleach/liquid chlorine are always cheaper than pucks. It's the cheapest source of chlorine there is.
    18x36 inground vinyl lined, Hayward sand filter and tablet chrolinator, approx 18k gallon

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    Re: Trichlor Puck Senario

    Maybe I answered myself: given 24k gals
    5# trichlor raises FC 23ppm... avg price per lb ~$2.75(i know cheaper in bulk) ~$13.75
    4.23G of 12.5% bleach to raise FC 23ppm ~ $3/gal ~$12.60...

    So it's cheaper for straight bleach over 3" Tabs??
    18x37 Vinyl Grecian (24k gals) 8' Inter fab(la mesa) Diving board w/ waterfall & Led, Pentair Laminars & Intellibrite 5g

    Star Rite System 3 Cartridge Filter, IntelliPro 3HP Variable Spd Pump, Max E Therm 400k BTU,
    Pentair Easy Touch 8 & actuators,...Now looking to BBB

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    Richard320's Avatar
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    Re: Trichlor Puck Senario

    Quote Originally Posted by blownby
    Maybe I answered myself: given 24k gals
    5# trichlor raises FC 23ppm... avg price per lb ~$2.75(i know cheaper in bulk) ~$13.75
    4.23G of 12.5% bleach to raise FC 23ppm ~ $3/gal ~$12.60...

    So it's cheaper for straight bleach over 3" Tabs??
    Don't forget the cost of the Baking Soda!

    Maybe I'm just a cheapskate or something, but why pay for CYA that I'll just be pumping out again?
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Re: Trichlor Puck Senario

    Ok, but was just looking at the pure cost of the chlorine, not compensating for the extras effects needed to balance....

    So it looks like the liquidator is in my future for auto daily maintenance!
    18x37 Vinyl Grecian (24k gals) 8' Inter fab(la mesa) Diving board w/ waterfall & Led, Pentair Laminars & Intellibrite 5g

    Star Rite System 3 Cartridge Filter, IntelliPro 3HP Variable Spd Pump, Max E Therm 400k BTU,
    Pentair Easy Touch 8 & actuators,...Now looking to BBB

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    thehowheels's Avatar
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    Re: Trichlor Puck Senario

    My average FC loss per day is about 1.5 PPM. Over a week, that's about 10.5, which would require ~14 oz of trichlor pucks to maintain based on my pool size. According to poolcalculator.com, that would raise my CYA 6.5 every week. If I wanted to maintain my CYA @ 40 PPM, I'd have to drain my pool 15% every week.
    Matt
    9k gallon, plaster, IG. Raised spa w/ spillover into pool. AO Smith Century Centurion / Purex Triton WisperFlo 0.5 HP, Hayward 1.5 HP (spa), Polaris 1-516-01 1.5 HP (blower). Hayward DE3620 36 ft2 72 GPM DE Filter, Polaris 145 cleaner. Pool built ~1980.
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    Mr. Blue's Avatar
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    Re: Trichlor Puck Senario

    Yesh. I don't think I'm vacuuming that much!
    23K Gallon Freeform Tile Inground
    Hayward Super II 1.5 HP -- Pentair FNSP48 DE Filter @ 120 GPM
    Polaris 3900 Sport (with Booster Pump)


    Pool School Attendee -- The TF-100 Test Kit and the Pool Calculator keep my pool Trouble Free -- BBB Supporter

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