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Thread: vac algae topic changed shocking now..with results

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    vac algae topic changed shocking now..with results

    Hi everyone .. back again... Finally got my new test kit tf-100....here are my numbers....

    CC -0
    FC-0
    TA-160
    PH-7.2
    CYA-30
    CA- 200

    I have about 30 gallons of 6% bleach ready to go... now just need some free time... with all the family functions going on and the constant rain here ...just been to busy... but this week looks good to shock it...

    I do have visible algae.. I will scrub the walls and bottom with a brush... is it best to vac as much as I can out through the filter.. or just let the bleach do its thing...if I do vacuum some out,,, would I save a bit on bleach???? I have no problem getting more... ... or is it not worth the time???... thanks again for all the advice given allready.. scott
    20000 gal. 28' round
    1.5 hp pump
    3.5 and 6 deep
    22" round meteor sand filter
    tf-100 test kit

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    Re: Best to Vac algae before shocking?

    Hi, Scott,

    Unless it solid junk that you can scoop out with a net, don't bother. Put the chlorine in and kill it dead and then start vacuuming and filtering. You would save nothing on bleachas the algae simply grows right back in your pool as you vacuum some of it out.

    Your numbers look very good for starting the shock process. Remember, keep your chlorine up at shock level by testing very frequently the first day and then something on the order of twice daily thereafter and replenishing right back to shock value each time it tests below that.

    Good luck and keep us posted!!
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Best to Vac algae before shocking?

    If you vacuum out on waste you might end up with less dead algae to clean up afterwards. But it might not be worth the water loss. Vacuuming live algae on filter with a sand filter usually will result in a green cloud of algae shooting out the returns.
    -Kevin
    X-Pert Pool Service
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    22,000 gal / 16' x 32' / Vinyl / Hayward s244t /Pentair SuperFlo 1 hp

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    Re: Best to Vac algae before shocking?

    ok.. .Im shocking the pool as I write this... heeeeeeeeeeeeeeeeeeeeeeeeelp....
    k started dumping in my Bleach at about 11:45 (CST)all bleach amounts from Pool Calculator did my first test on sunday night cya 30 pretty darn sure i did it correct.... right amount of testing and filled at the hip.. just like instructions told me...

    11:45 am start..... 546 oz Bleach

    checked @ 12:45pm FC-4.5 CC- 2
    added 278 oz of bleach

    checked @ 1:40pm FC- 13.5(target pool calculator for shock 12)

    checked @ 2:30pm FC- 12.5

    checked @ 3:40 FC- 8 CC- 2.5
    added 182 oz

    checked @ 5:05 FC- 17 CC- 1.5

    checked @ 6:50 FC- 6
    added 278 oz..

    checked @ 7:45 FC- 19 CC- 2

    checked @ 8:45 FC - 19

    checked @ 9:45 FC-14.5 CC-1.5
    added 364 oz. TO BED...

    day 2
    checked 5:30am FC- 21 CC -1.5

    checked 4:00pm FC-12 CC-1
    added 96 oz bleach...

    Checked 8:30pm FC-14 CC-.5

    checked 10:30pm FC 12 CC-.5

    day 3
    checked 5:45 am FC 12 CC-.5




    am I going about this corretly... t
    thanks scott
    20000 gal. 28' round
    1.5 hp pump
    3.5 and 6 deep
    22" round meteor sand filter
    tf-100 test kit

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    Mod Squad JohnT's Avatar
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    Re: Best to Vac algae before shocking?

    Nothing you've done should have changed your CYA reading or affected the test.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Best to Vac algae before shocking?

    Hi John.. so should I continue on as the CYA at 30... or continue on at the 60..... .thanks
    20000 gal. 28' round
    1.5 hp pump
    3.5 and 6 deep
    22" round meteor sand filter
    tf-100 test kit

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    Re: vac algae topic changed shocking now..with results

    Scott, do one more test tomorrow AM and repeat it several times.....use the same mixture dumping it in and out of the view tube maybe four times. Try to be objective about what you get each time....don't let the previous result influence you.

    Take the average of your results and let that be your "true" CYA and dose your chloinre accordingly
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: vac algae topic changed shocking now..with results

    I think I figured out why my test showed 60 cya...I did the CYA test the night before the shock process the water was somewhat clear.... then started shocking and all day of adding bleach.. the water is so cloudy from the algae I think its the algae in the test tube that made the test cloudy giving it a high reading.. does this make any sense.. thanks scott
    20000 gal. 28' round
    1.5 hp pump
    3.5 and 6 deep
    22" round meteor sand filter
    tf-100 test kit

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    JasonLion's Avatar
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    Re: vac algae topic changed shocking now..with results

    Testing at night can give you a higher CYA reading than the actual level.

    Cloudy/murky water causing an incorrect CYA reading is rare. One way you can check for this is to fill the view tube with straight pool water. If you can still see the black dot clearly then the cloudy/murky water is not affecting the CYA reading.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: vac algae topic changed shocking now..with results

    retested CYA.. today.. .25.... water is clearer than yesterday....Im down to 1 on the CC.... im almost there....
    20000 gal. 28' round
    1.5 hp pump
    3.5 and 6 deep
    22" round meteor sand filter
    tf-100 test kit

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    Re: vac algae topic changed shocking now..with results

    Can someone look at one of my previous post on this topic...all my #'s and times are posted... I made it through the night without a reduction in FC....... and I have a CC of .5.......and see if my numbers are ok to do the normal levels for a 25/30 CYA pool.... pool is getting clearer everyday... didn't get a chance to check my #'s during lunch .. but will as soon as I get home .. thanks again for all the help.. .scott
    20000 gal. 28' round
    1.5 hp pump
    3.5 and 6 deep
    22" round meteor sand filter
    tf-100 test kit

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    frustratedpoolmom's Avatar
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    Re: vac algae topic changed shocking now..with results

    If you lose 1ppm or less of FC overnight, and your CC is .5 or less, then you are "done" shocking and can allow the FC to drop to 'normal' levels (refer to the chart.)
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    Re: vac algae topic changed shocking now..with results

    another ?.... last night.. @ 10:30pm had a FC of 12 and a CC of .5 in the morning same reading..... had a beutiful day lots of sun... hardly any clouds... didn't get a chance to check at lunch.... so I quick did it as soon as I got home.. 4:00 pm.....reading were FC 6 and a CC of 1... I quickly added 2-96oz of bleach and checked in one hour... readings were 13.5 FC and .5 CC...and tonight at 10:00 pm... had readings of 12 FC and .5 CC
    is this normal.. ????
    forcast tomorrow lots of sun again.... can I expect a pretty good loss again tomorrow?
    thanks again.. scott
    20000 gal. 28' round
    1.5 hp pump
    3.5 and 6 deep
    22" round meteor sand filter
    tf-100 test kit

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    Re: vac algae topic changed shocking now..with results

    Scott,

    How does your water look and have you done anything to change your CYA from your last test of 30ppm?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: vac algae topic changed shocking now..with results

    water is pretty cloudy...did cya test and showed a 30... I scrubed and vacuum out a few leaves ..but it looks to me like its getttin a little clearer each day...I did have a FC lose of 2.5.... went from 12 at 9:30pm to 9.5 at 6:15am the next day. and a CC reading of .5 so i did add bleach again... how come one night I didn't loose any FC.. but last night I did?????... doensn't that mean algae is still there????? thanks scott
    20000 gal. 28' round
    1.5 hp pump
    3.5 and 6 deep
    22" round meteor sand filter
    tf-100 test kit

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    Re: vac algae topic changed shocking now..with results

    doensn't that mean algae is still there?????
    Essentially, yes. You certainly have organics in the pool and it is likely algae.

    Be patient and keep up the process. Brush as often as you can, continue to replenish chlorine, etc. Do you have any areas in your pool where algae can hide? Perhaps like under steps, ladders, etc. Make sure those are clean.

    It sounds like you are getting there and just need to keep doing what you are doing. I cannot answer why you experienced no FC loss that one evening.....sometimes things aren't as predictable as we'd like them to be.

    If you want to change something, bump your FC up to around 16 or so and see if that speeds up the process. Not always, but sometimes there are reports of that making a dramatic difference.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    frustratedpoolmom's Avatar
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    Re: vac algae topic changed shocking now..with results

    Not sure why... testing error on one or the other?

    Yes, keep shocking - that's a significant loss.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    Re: vac algae topic changed shocking now..with results

    thanks.. you folks have been very helpful... greatly appreciated... scott
    20000 gal. 28' round
    1.5 hp pump
    3.5 and 6 deep
    22" round meteor sand filter
    tf-100 test kit

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    Re: vac algae topic changed shocking now..with results

    Quote Originally Posted by scott6824
    how come one night I didn't loose any FC.. but last night I did?????... doensn't that mean algae is still there????? thanks scott
    Might be that brushing exposed some live algae that was hiding under dead algae.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

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    Re: vac algae topic changed shocking now..with results

    I got to thinking that too... cleaver stuff that algae..... just went home and stirred it up some more.. thanks..scott
    20000 gal. 28' round
    1.5 hp pump
    3.5 and 6 deep
    22" round meteor sand filter
    tf-100 test kit

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