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Thread: My first set of levels!!,

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    eap2313's Avatar
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    My first set of levels!!,

    FC = 2
    CC = 1.5
    CYA = <20 (~19)
    TA = 160
    CH = 220
    OTO = 0.5/7.8

    This is my first set of levels on my first pool. What can I make of this? I feel like I may have done something wrong since FC + CC doesn't equal OTO level. Also, my CYA seems really low. HELP!!!

    Thanks
    16K gal Plaster Pool (built approx. 1999)| 2HP Purex Triton WhisperFlo Pump | Polaris PB4 Booster Pump | Purex Triton Sea Horse Cartridge Filter FSH 500 (DE grids inside) | Hayward Vari-Flo Valve | Compool 3-Way Valves | Chlorine/Bromine Feeder Model 320 (Rainbow Lifegard) | Laars Lite Heater | Whisper Jet II (Tropic Air) | 6'9" x 6'9" Spa
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    Re: My first set of levels!!,

    Take a breath

    First, it is rare that the OTO and the FAS-DPD match. The OTO is good about detecting the presence of chlorine, but the FAS-DPD is much better at telling how much.

    Was the OTO very light yellow? How many drops did you use in the FAS-DPD test?

    Just want to verify you were doing it correctly. Before offering more advice.

    You are correct that you CYA is a little low so that should be raised to at least 30ppm. Bigger concern is whether you really have a CC of 1.5 which would indicate a need to go through the shock process.

    How does the water look?
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    Re: My first set of levels!!,

    I used a large scoop of the powder and it got to 5 drops when no color change. I subtracted by 1 and got 4 making my FC equal 2. I actually thought my CC was 0 at first but after it sat for like 4-5 minutes I noticed it had a light pink hue. The chlorine in OTO test was very faint yellow which looked like the bottom color of the OTO test. Water looks very clear just like in my avatar.
    16K gal Plaster Pool (built approx. 1999)| 2HP Purex Triton WhisperFlo Pump | Polaris PB4 Booster Pump | Purex Triton Sea Horse Cartridge Filter FSH 500 (DE grids inside) | Hayward Vari-Flo Valve | Compool 3-Way Valves | Chlorine/Bromine Feeder Model 320 (Rainbow Lifegard) | Laars Lite Heater | Whisper Jet II (Tropic Air) | 6'9" x 6'9" Spa
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    Re: My first set of levels!!,

    The FAS-DPD test will always tend to drift to pink if you let it sit. Only look for immediate changes. So, sounds like your CC was likely 0

    Given that and the clear water. You are in pretty good shape.

    Get some CYA in the water to add about 10-15ppm to start and then test again in a week to verify the level.
    Keep you FC above 2ppm at all times. As you add CYA, your minimum FC requirement will also rise.

    Also, given your high TA, the pH will likely drift up. At 7.8 you are at the top of the recommend range. Lower that down to the lower 7s. If you want to start lowering the TA see: Lowering Total Alkalinity in Pool School.
    Jason, TFP Moderator
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    Re: My first set of levels!!,

    Thanks! Doesn't seem like I have too much to make everything right so that's good news.
    16K gal Plaster Pool (built approx. 1999)| 2HP Purex Triton WhisperFlo Pump | Polaris PB4 Booster Pump | Purex Triton Sea Horse Cartridge Filter FSH 500 (DE grids inside) | Hayward Vari-Flo Valve | Compool 3-Way Valves | Chlorine/Bromine Feeder Model 320 (Rainbow Lifegard) | Laars Lite Heater | Whisper Jet II (Tropic Air) | 6'9" x 6'9" Spa
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    Re: My first set of levels!!,

    I just cleaned my DE grids and backwashed. When I starting running my filter like normal looked like some residue fom the backwash was still in there and came back in my pool via returns. I ran the pump and filter all night and it seems like the dirt just settles to the bottom. When I try to vacuum it seems like the vac just pushes the dirt around and then settles back at the bottom of the pool. My vac works fine and so is there any reasoning for this?

    Also, I added some muriatic acid and CYA to my pool. Can they stain the plastering my pool? I've notice a very white looking spot by the main drain and then some tear drop like tannish brown stains on my plaster since adding.

    Thanks
    16K gal Plaster Pool (built approx. 1999)| 2HP Purex Triton WhisperFlo Pump | Polaris PB4 Booster Pump | Purex Triton Sea Horse Cartridge Filter FSH 500 (DE grids inside) | Hayward Vari-Flo Valve | Compool 3-Way Valves | Chlorine/Bromine Feeder Model 320 (Rainbow Lifegard) | Laars Lite Heater | Whisper Jet II (Tropic Air) | 6'9" x 6'9" Spa
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    Re: My first set of levels!!,

    If you added the chemicals as described in Pool School then they would not stain.

    If you dumped the MA in with the pump off, or through the CYA granules into the pool, then that could cause issues.

    Posted from my Droid with Tapatalk ... sorry if my response is short
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    Re: My first set of levels!!,

    I will be getting my second set of levels today for my pool and wanted to know if there are any differences for my spa. They are connected and there is a little splash over slot from the spa to the pool. Do I need to test both my pool and spa? I have my suction come from the pool, but my returns are set to the pool and spa. Are there any care differences for the two in regards to chemicals?
    16K gal Plaster Pool (built approx. 1999)| 2HP Purex Triton WhisperFlo Pump | Polaris PB4 Booster Pump | Purex Triton Sea Horse Cartridge Filter FSH 500 (DE grids inside) | Hayward Vari-Flo Valve | Compool 3-Way Valves | Chlorine/Bromine Feeder Model 320 (Rainbow Lifegard) | Laars Lite Heater | Whisper Jet II (Tropic Air) | 6'9" x 6'9" Spa
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    Re: My first set of levels!!,

    There should not be any difference between the pool and spa ... that is the point of the spillover.

    Posted from my Droid with Tapatalk ... sorry if my response is short
    Jason, TFP Moderator
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    Re: My first set of levels!!,

    Thanks. I didn't think so, but just wanted to make sure. Also, not sure if you're familiar with DE filters, but I recently cleaned mine and when starting the pump again I got a little bit debris back in my pool through the returns. I read in another post that it make be an air leak. I may have to take the top off and reassemble, but doesn't this sound about right to you in regards to the leak? Are there other poosible causes for this? Thanks.
    16K gal Plaster Pool (built approx. 1999)| 2HP Purex Triton WhisperFlo Pump | Polaris PB4 Booster Pump | Purex Triton Sea Horse Cartridge Filter FSH 500 (DE grids inside) | Hayward Vari-Flo Valve | Compool 3-Way Valves | Chlorine/Bromine Feeder Model 320 (Rainbow Lifegard) | Laars Lite Heater | Whisper Jet II (Tropic Air) | 6'9" x 6'9" Spa
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    Re: My first set of levels!!,

    Does the debris only enter the pool the first time you turn the pump back on "filter" after backwashing?

    I have read other people see this (I do not) and it seems kind of normal.

    You should really not get DE back to the pool unless a grid is ripped, there is something else cracked in the skimmer, or the backwash valve is leaking ... nothing to do with a air leak (well unless the filter fills with air and when the pump turns off some dirt is forced backward through the suction side).
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    Re: My first set of levels!!,

    It only happened once, but it seems like it all just fell to the bottom. When I try to vacuum the pool's floor it seems as if it's just pushing it all around making the pool look cloudy and not really getting it all up. After a few hours you can see the debris as settled again. I know it's from the backwash because I saw it happen immediately afte I did it. But now new debris has come out of my returns since.
    16K gal Plaster Pool (built approx. 1999)| 2HP Purex Triton WhisperFlo Pump | Polaris PB4 Booster Pump | Purex Triton Sea Horse Cartridge Filter FSH 500 (DE grids inside) | Hayward Vari-Flo Valve | Compool 3-Way Valves | Chlorine/Bromine Feeder Model 320 (Rainbow Lifegard) | Laars Lite Heater | Whisper Jet II (Tropic Air) | 6'9" x 6'9" Spa
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    Re: My first set of levels!!,

    You need to move the vacuum very slowly and evenly so you don't create any water movement that might stir up the debris/dust before you can get to it.
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    Re: My first set of levels!!,

    But now new debris has come out of my returns since.
    Make absolute 100% sure it is DE. (scoop some out of the pool and see if it feels slimy) It sounds like dead algae to me and you will need to shock your pool.
    Dave S.
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    Re: My first set of levels!!,

    The debris is definitely a brownish dirt color unlike the white color of DE. My FC was 2 on Friday and I add 2 lbs of cal hypo to try and bring the level up to 4 (I still had 2 pucks of trichlor in there in the autochlorinator at the time) and I added 3 lbs of CYA since my level was ~19. I will definitely see how much bleach it will take to shock it, but since I just added CYA on Saturday and it's recommended that I wait a week to check it again, is it okay to still shock without knowing how much CYA I may need to add (if any)?
    16K gal Plaster Pool (built approx. 1999)| 2HP Purex Triton WhisperFlo Pump | Polaris PB4 Booster Pump | Purex Triton Sea Horse Cartridge Filter FSH 500 (DE grids inside) | Hayward Vari-Flo Valve | Compool 3-Way Valves | Chlorine/Bromine Feeder Model 320 (Rainbow Lifegard) | Laars Lite Heater | Whisper Jet II (Tropic Air) | 6'9" x 6'9" Spa
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    Re: My first set of levels!!,

    I think I'll just shock it today and perform the OCLT to see for sure if it's algae. Does dead algae work with this test on solely live growing algae?
    16K gal Plaster Pool (built approx. 1999)| 2HP Purex Triton WhisperFlo Pump | Polaris PB4 Booster Pump | Purex Triton Sea Horse Cartridge Filter FSH 500 (DE grids inside) | Hayward Vari-Flo Valve | Compool 3-Way Valves | Chlorine/Bromine Feeder Model 320 (Rainbow Lifegard) | Laars Lite Heater | Whisper Jet II (Tropic Air) | 6'9" x 6'9" Spa
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    Re: My first set of levels!!,

    Do the shock process assuming that the amount of CYA you have added is "active".
    Jason, TFP Moderator
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    Re: My first set of levels!!,

    Thanks all. Will report results tomorrow.
    16K gal Plaster Pool (built approx. 1999)| 2HP Purex Triton WhisperFlo Pump | Polaris PB4 Booster Pump | Purex Triton Sea Horse Cartridge Filter FSH 500 (DE grids inside) | Hayward Vari-Flo Valve | Compool 3-Way Valves | Chlorine/Bromine Feeder Model 320 (Rainbow Lifegard) | Laars Lite Heater | Whisper Jet II (Tropic Air) | 6'9" x 6'9" Spa
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    Re: My first set of levels!!,

    Quote Originally Posted by eap2313
    I think I'll just shock it today and perform the OCLT to see for sure if it's algae. Does dead algae work with this test on solely live growing algae?
    See if this helps....

    Chlorine is lost from a pool by two methods. It is either "used up" in doing its work to eliminate bather waste or other organic material, or it is broken down in the presence of UV rays/sunlight. By doing the OCLT at night, you are eliminating sunlight as a possibility. If you lose FC overnight, there must be something living in your pool, and you have to start/continue shocking.
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    Re: My first set of levels!!,

    Shocked my pool with 240 ounces of 8.25% bleach twice tonight with an hour in between each one. My final FC reading was 27 somewhere between 30 minutes to an hour after the second shock. (Note: my chlorinator has a valve on it in which I think I turned it off, but I'm not competely sure) My pH was 7.8 so I added 36 ounces of muriaric acid to bring it down to 7.2 in which I will increase with Borax once the pH is lowered. I will measure the FC and pH in the morning before direct sunlight on the pool. My pump will have ran for 3-4 hours prior to cutting off for the night. Until the AM...
    16K gal Plaster Pool (built approx. 1999)| 2HP Purex Triton WhisperFlo Pump | Polaris PB4 Booster Pump | Purex Triton Sea Horse Cartridge Filter FSH 500 (DE grids inside) | Hayward Vari-Flo Valve | Compool 3-Way Valves | Chlorine/Bromine Feeder Model 320 (Rainbow Lifegard) | Laars Lite Heater | Whisper Jet II (Tropic Air) | 6'9" x 6'9" Spa
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