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Thread: New pool, gone for a week, where to start?

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    Question New pool, gone for a week, where to start?

    Hi All!

    Long time lurker, first time poster!

    Last week (Friday the 10th) we had a nice little fiberglass pool installed. Less than 24 hours after the pool was installed we left to go on vacation for a week. Unfortunately the electrician wasn't able to get the pump working until Thursday, so the pool sat unfiltered and stagnant for almost a week.

    Flash forward to today... we returned home from vacation. The pump and filter were running, yay! The pool isn't nearly as green/dirty as I thought it would be, but it's not the sparkling oasis that we desire. I busted out my Taylor K-2006 test kit and got busy. Here's what I found:

    FC: 0
    CC: 0
    pH: 8.0 (maybe greater, it took 3 drops of the acid demand reagent to get it down to 7.5)
    TA: 150 ppm
    CH: 250 ppm
    CYA: 0
    Salt: <1 on an aquachek test strip

    Clearly I need to get my FC and CYA levels up before adding my salt and turning on my SWG. PoolMath made the quantities easy, I'm just not sure of the order. Do I start with trying to get the FC up, or the CYA or both? Or do I start with the pH and TA? Or do I tackle it all at the same time?

    I have 5 gallons of 8.3% bleach and 5 pounds of CYA powder on hand. I can easily get more chemicals if/when needed from hardware stores and/or pool supply stores.

    Please guide me, oh great ones!

    Thank you!
    Pool Size/Type: 17,500 gallon, 16x40 IG fiberglass; Pump: Hayward Superpump II, 2 HP, 2 Speed; Filter: Hayward C3030 cartridge
    Heater: Hayward H250FDN; Sanitation: Hayward Aquarite w/ T-CELL-9 SWG; Test Kit: Taylor K-2006 // Spa: Hot Spot Rhythm; 355 gallons; CD ozonator; Bromine

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    Re: New pool, gone for a week, where to start?

    Lower your pH to 7.2 then SLAM...

    Dissolve enough CYA for a target of 30 and add bleach for a target of 12. You won't be able to test the CYA for up to a week so just assume pool math adds the right amount. Keep your FC above 12 until you complete OCLT. Read pool school which goes into detail of this.

    Once you complete the SLAM increase your CYA for your SWG and you can add your salt. In the 24 hours your salt dissolves you can let your FC drop to 7 then turn on your SWG. Continue to monitor FC not letting it drop below 5 until you get your swg schedule set.
    18' x 38' Pool, 3' to 8' Depth
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    Mod Squad pooldv's Avatar
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    Re: New pool, gone for a week, where to start?

    Welcome to TFP! Congrats on the new pool!

    Yes, that is all good advice. Except you can add the salt anytime along the way, it won't impact the SLAM.

    Here is the process to Pool School - SLAM - Shock Level And Maintain.

    And here is the Pool School - Water Balance for SWGs you are looking for after you get the water cleared up.
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    Re: New pool, gone for a week, where to start?

    How much will 30ppm of CYA realistically lower pH? How long does it take for it to happen?
    17,100 Gal 27' x 52" AGP steel wall vinyl; 44gpm Cooper sand filter; Hayward 1hp sp1580 single-speed; 1.5" plumbing, 1 skimmer/jet, inline chlorinator.
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    Re: New pool, gone for a week, where to start?

    Thanks, guys! I appreciate the speedy advice!

    Based on other threads I'm assuming I should run the pump on the high speed 24/7 until the SLAMing is complete?
    Pool Size/Type: 17,500 gallon, 16x40 IG fiberglass; Pump: Hayward Superpump II, 2 HP, 2 Speed; Filter: Hayward C3030 cartridge
    Heater: Hayward H250FDN; Sanitation: Hayward Aquarite w/ T-CELL-9 SWG; Test Kit: Taylor K-2006 // Spa: Hot Spot Rhythm; 355 gallons; CD ozonator; Bromine

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    Re: New pool, gone for a week, where to start?

    Quote Originally Posted by DanielP View Post
    How much will 30ppm of CYA realistically lower pH? How long does it take for it to happen?
    According to pool math adding 30ppm of CYA (72oz in 18,000gal) will lower pH by 0.56

    I would think it will reach that within 5-7 days (time it takes to dissolve)

    Dom
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    Intex 18' X 48" Ultra Frame AGP 6700 gallons | Two Intex CS8110 SWG's | Hayward Pro Series 21" Sandfilter | Hayward 1.5HP Power Flo Matrix pump | Hayward Thru-wall Skimmer | Wanda the Whale | 72 sq ft of Sungrabber Solar Panels with Hayward GLC-2P-A | Taylor K2006 Test Kit, Sample Sizer & Speed Stir | Click Here To Become a TFP Supporter!

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    Re: New pool, gone for a week, where to start?

    That's right Chris. During your SLAM, the pump must be on 24/7 to continuously mix the bleach throughout your water/plumbing systems. Don't forget to sweep and brush often, and clean your filter frequently to remove any dead algae. If you have any more questions, you can always refer back to the Pool School - SLAM - Shock Level And Maintain page to refresh your memory. Good luck!
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Re: New pool, gone for a week, where to start?

    Quote Originally Posted by Texas Splash View Post
    That's right Chris. During your SLAM, the pump must be on 24/7 to continuously mix the bleach throughout your water/plumbing systems. Don't forget to sweep and brush often, and clean your filter frequently to remove any dead algae. If you have any more questions, you can always refer back to the Pool School - SLAM - Shock Level And Maintain page to refresh your memory. Good luck!
    Got it, thanks!

    As far as the CYA goes. I see some folks use a sock, some don't. Does it matter? I'd much prefer to just dump it in the skimmer if the end result is the same.
    Pool Size/Type: 17,500 gallon, 16x40 IG fiberglass; Pump: Hayward Superpump II, 2 HP, 2 Speed; Filter: Hayward C3030 cartridge
    Heater: Hayward H250FDN; Sanitation: Hayward Aquarite w/ T-CELL-9 SWG; Test Kit: Taylor K-2006 // Spa: Hot Spot Rhythm; 355 gallons; CD ozonator; Bromine

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    Texas Splash's Avatar
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    Re: New pool, gone for a week, where to start?

    Do not dump in the skimmer. Best to use a sock or nylon - anything suitable to hold the granules so they can dissolve slowly and not just fall on the pool floor or get ingested into the pump/filter. You can hang the sock in front of a return jet or place near/in the skimmer that way, just be careful it doesn't block water flow.

    - - - Updated - - -

    Oh, and you can squeeze it occasional to help encourage the dissipation of the power as it dissolves.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Mod Squad pooldv's Avatar
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    Re: New pool, gone for a week, where to start?

    The problem with dumping it in the skimmer is it goes straight to the filter and sits there until it dissolves. If you clean or backwash the filter then you lose the CYA.
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    Re: New pool, gone for a week, where to start?

    Gotcha. Used one of the wife's nylons. It didn't take long for the 4.5 lbs to dissolve.
    Pool Size/Type: 17,500 gallon, 16x40 IG fiberglass; Pump: Hayward Superpump II, 2 HP, 2 Speed; Filter: Hayward C3030 cartridge
    Heater: Hayward H250FDN; Sanitation: Hayward Aquarite w/ T-CELL-9 SWG; Test Kit: Taylor K-2006 // Spa: Hot Spot Rhythm; 355 gallons; CD ozonator; Bromine

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    Re: New pool, gone for a week, where to start?

    I think I did pretty well today. Added about 6 gallons of bleach, 4.5 lbs of CYA and 400 lbs of salt. I wasn't able to find MA at the local HD, and I didn't have time to get to the pool supply store, so the pH remains unchanged.

    Full results as of about 8:15 tonight (last bleach addition was at 5:30):

    FC: 12.2
    CC: 0.4
    pH: > 8 (acid demand test was 4 drops to 7.4)
    TA: 160

    The water looks mostly clear. I can see the bottom, but not crystally. It's still a bit dirty, looks like mostly dirt and stone dust. The brushing and vacuuming I did today seems to have helped.

    Thanks again for all the guidance and looking forward to seeing what the tests show in the morning!
    Pool Size/Type: 17,500 gallon, 16x40 IG fiberglass; Pump: Hayward Superpump II, 2 HP, 2 Speed; Filter: Hayward C3030 cartridge
    Heater: Hayward H250FDN; Sanitation: Hayward Aquarite w/ T-CELL-9 SWG; Test Kit: Taylor K-2006 // Spa: Hot Spot Rhythm; 355 gallons; CD ozonator; Bromine

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    Re: New pool, gone for a week, where to start?

    Stay with it Chris. Hopefully everyday you will see some improvement. While SLAMming, don't worry about PH now. The high FC messes with the PH, so you won't get an accurate reading anyways. Focus on the SLAM for now. Good luck.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Re: New pool, gone for a week, where to start?

    The water was even more clear this morning. I think I'm almost there.

    FC: 9.4
    CC: 0.4

    Thinking might be ready for the weekend... maybe?
    Pool Size/Type: 17,500 gallon, 16x40 IG fiberglass; Pump: Hayward Superpump II, 2 HP, 2 Speed; Filter: Hayward C3030 cartridge
    Heater: Hayward H250FDN; Sanitation: Hayward Aquarite w/ T-CELL-9 SWG; Test Kit: Taylor K-2006 // Spa: Hot Spot Rhythm; 355 gallons; CD ozonator; Bromine

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    Texas Splash's Avatar
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    Re: New pool, gone for a week, where to start?

    Very close. Just make sure you maintain the SLAM FC level until your pass your OLCT. That OCLT is very important. Hopefully soon.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Re: New pool, gone for a week, where to start?

    Almost passed OLCT last night.

    FC after sun down (about 8:30p): 11.6
    FC just before sun hits the pool (about 7:15a): 10.4

    I added a little less than 1/2 a gallon of 8.3% bleach this morning, just to be on the safe side. I also added another 80 lbs of salt since my strips were reading only about 2700 ppm.

    CC stayed at 0 both last night and this morning.

    I did go for my first swim to hand brush some hard to reach spots, so maybe that accounted for a little loss as well?

    Water is now crystal clear. I can almost see the individual bits of dirt in the deep end.

    The kids and wife are getting very antsy!
    Pool Size/Type: 17,500 gallon, 16x40 IG fiberglass; Pump: Hayward Superpump II, 2 HP, 2 Speed; Filter: Hayward C3030 cartridge
    Heater: Hayward H250FDN; Sanitation: Hayward Aquarite w/ T-CELL-9 SWG; Test Kit: Taylor K-2006 // Spa: Hot Spot Rhythm; 355 gallons; CD ozonator; Bromine

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    Mod Squad pooldv's Avatar
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    Re: New pool, gone for a week, where to start?

    Drop the FC 1 ppm below shock level and go swimming! We swam every day for a week and a half while slamming. CYA 70 and FC 25-28. It is safe to swim up to shock level for your CYA.
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    Re: New pool, gone for a week, where to start?

    Thought last night as the night, but not so much.

    FC last night: 15
    FC this morning: 13.5

    Getting close. Hopefully tonight.

    In other news I turned on the SWG this morning. The instant salt reading immediately went to 0 and said "check salt" and "check cell". My test strips say I'm 3700 to 3900 ppm (last night said 3750, this morning's said 3950). The cell is brand new, but I checked it anyway and it looks fine. I left it on to see if it changes it's mind. I'll turn it off again tonight before trying to OLCT again.
    Pool Size/Type: 17,500 gallon, 16x40 IG fiberglass; Pump: Hayward Superpump II, 2 HP, 2 Speed; Filter: Hayward C3030 cartridge
    Heater: Hayward H250FDN; Sanitation: Hayward Aquarite w/ T-CELL-9 SWG; Test Kit: Taylor K-2006 // Spa: Hot Spot Rhythm; 355 gallons; CD ozonator; Bromine

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