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Thread: CL vs FC and my first possible screw up

  1. Back To Top    #1

    Join Date
    Jun 2013
    Location
    Chicago, IL
    Posts
    2

    CL vs FC and my first possible screw up

    Newbie here with a question on using bleach for a 12’X30” Intex pool. Pool was set up and filled last weekend – used the pool calculator to identify quantity of bleach that I needed to add –My first mistake was not paying attention to the differences in my Kit and the calculator. My kit gives me a CL/BR reading and the calculator uses a FC reading (still researching what the difference is).

    My initial CL was .5. Pool is about 2000 gallons (its not filled all the way to the top) and I added 1 and 1/3 cup of 8% bleach using the FC calculation from the pool Calculator.

    Using my test kit – my CL level is now 5 and my PH is 8.2. I guess my question is based around me thinking that the amount of bleach that I added really didn’t seem like it would have that effect on 2000 gallons of water. Is this a normal water reaction to what I think is a small quantity of bleach? I remember growing up as a kid and being able to smell the chemicals in the pool – I’m at a high CL level and can’t smell/detect anything in the water (which im ok with – but just wanted to be sure I didn’t do anything wrong)

    The pool sits under a small tree and is pretty much out of direct sunlight just based on me living in the city and this really being the only place for me to install the pool. Will it not being in the sunlight have any adverse effect on maintaining the water? I actually think it’s better as this pool is for my 2.5 year old daughter and my preference is to have her shaded when in it.
    Also – my PH level seems high based off what I have read from Pool School – I have also read that 8.2 isn’t really that high and that a high PH isn’t the end of the world. Im still going to pick up some acid tomorrow to try and bring it down – more of a learning experience for me than anything.

    Hope I didn’t screw up anything based on my rushing into this and not realizing the difference between CL and FC – but please guide me/teach me…. Also - if bleach is not the way to go for this pool - please let me know. I just figured it was small and bleach would be the easiest to use based on the assumption that tablets may over-do it for such a small pool.

    Thank you in advance for your time/help - lots to learn but I think i found the best possible place!

  2. Back To Top    #2

    Join Date
    Jul 2010
    Location
    minneapolis, mn
    Posts
    31

    Re: CL vs FC and my first possible screw up

    I have owned multiple sizes on the intex easy set and now have one that is 12x30 and have used the bbb method with all sizes so much easier than the pucks!!!

    From my understand and experience it should only smell really "bleachy" when you do not have enough. I keep mine higher than most but under shock and unless it gets low I never get the " pool" smell. It just smells nice.

    To shock my pool at roughly 2,086 gallons I used 36 oz. so yes the 8% packs a nice punch.

    The shade tree overhead won't effect much we have the same issue. It takes a little longer to warm up. So I use a solar cover at night to maintain temp. And also be aware of tree debris, pollen, leaves and bird poop. It can get a little sketchy after heavy rain so shock as needed.
    12'x30" Intex AG 1,485g pool, w/530gph cartidge filter

  3. Back To Top    #3
    UN1017's Avatar
    Join Date
    May 2012
    Location
    Sacramento, CA
    Posts
    288

    Re: CL vs FC and my first possible screw up

    Welcome to TFP!

    That is a completely expected change for what you added.

    As far as the FC/CL thing goes, they are one in the same. Your test kit is giving you a FC (free chlorine) level. The BR on your test block is for bromine, which is for spas...so you can ignore that column.

    You do need to get the pH down. My recommendation is to do your additions incrementally until you know how your pool will respond. You can always add more if needed but you can't take it back once it's in the pool.
    15'x30' IG - Roman-style - 14K - Pebble Fina Classico
    Filter: Jandy CL460 Pump: Jandy Stealth SHPF1.5 SWG: Jandy AquaPure 1400 Cleaner: Jandy RayVac Test Kit: TF-100 w/SpeedStir

    Chlorine/CYA Chart----Extended Test Kit Directions----SLAM

  4. Back To Top    #4

    Join Date
    Jun 2013
    Location
    Chicago, IL
    Posts
    2

    Re: CL vs FC and my first possible screw up

    thanks for both of the quick and informed responses...

    Im still shocked about how little an amount of bleach packs that much of a punch!

    I will work on getting the PH down - but I think im going to have more problems to deal with as Chicago just got about 2 inches of rain in a 1.5 hr period!

    Cant wait to see what that did to my water chemistry!

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