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Thread: Mustard "like" sediment in August

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    Mustard "like" sediment in August

    Hello All,

    First post. Thanks for this site, it has helped me so much over the last three years!
    I just opened my sparkling clean pool here in middle Ohio. Everything is fine and readings are good. I know I'll have a sparkling clean pool for all of June and July. However, come early August, I'll start to get yellow/green sediment on the bottom of the pool(has happened every year). Very frustrating. What could it be? I am right across from many acres of farmland (corn or soybean depending on the year), is that the issue? Would think I would get that earlier when the crops pollinate.

    Has happened every year since we installed. It is a weekend place for us so we can't vacuum everyday, but when we come down for the weekends, I have to vacuum to waste so it doesn't get in the sand filter as the sediment is so fine it kicks back through the filter into the return jet and pool.

    Any idea? Tips? Advice?

    Thanks and again, this site rocks!

    Easy
    24 ft round Esther Williams Aluminum Above Ground Pool, Saltrom Retro SWG, Hayward 1.5 HP Power-Flo pump, Hayward 166t 16" Sand Filter, 6 pack of Miller Lite as an accessory

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    Mod Squad jblizzle's Avatar
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    Re: Mustard "like" sediment in August

    Welcome to TFP!!!

    How do you chlorinate your pool?
    Have you ever Deep Cleaned your Sand Filter?
    Jason, TFP Moderator
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    Re: Mustard "like" sediment in August

    OK, sorry I haven't responded sooner, family stuff and I'm a tech dinosaur and couldn't find my post.

    Again, not sure if post went through so I'm responding again. I used to chlorinate my pool with an inline chlorinator and 3" pucks. Always fought high CYA. Last year I switched to a Salt Water System...........works great.

    I haven't deep cleaned my sand filter, but did replace the sand two summers ago, so I think it should be clean.

    Thanks for the reply and if you think you can help I'd appreciate it!

    EASY
    24 ft round Esther Williams Aluminum Above Ground Pool, Saltrom Retro SWG, Hayward 1.5 HP Power-Flo pump, Hayward 166t 16" Sand Filter, 6 pack of Miller Lite as an accessory

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    Richard320's Avatar
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    Re: Mustard "like" sediment in August

    I wonder if they fertilize the fields and you get stuff blown in? That would certainly eat up the chlorine and feed any algae.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Re: Mustard "like" sediment in August

    Problem started early this year. Same thing, yellowish/brown (really light and "whispy") sediment on bottom of pool. Clear path where it is evident water return moves water.
    Got the Taylor Kit everyone on here recommends and here are my reading:
    Chlorine = 7 ppm (this is a place 100 miles from home and we only get here on weekends....so I keep it a bit on high side)
    CC = 0
    PH = 7.6
    TA 90
    CYA 75
    Vacuumed to waste, put in DE per Pool School last night, but this morning, although you can't see it with naked eye, running the brush along bottom shows whispy clouds when pushed through water. Water still relatively clear overall. Any advice?
    24 ft round Esther Williams Aluminum Above Ground Pool, Saltrom Retro SWG, Hayward 1.5 HP Power-Flo pump, Hayward 166t 16" Sand Filter, 6 pack of Miller Lite as an accessory

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    Mod Squad zea3's Avatar
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    Re: Mustard "like" sediment in August

    Your CYA is too high. What do you use for chlorine and how much did you add last week?
    TFP Moderator
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    DaninFLA's Avatar
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    Re: Mustard "like" sediment in August

    Quote Originally Posted by zea3 View Post
    Your CYA is too high. What do you use for chlorine and how much did you add last week?
    OP says he uses a saltwater system so CYA is in line. a bit high for a SLAM but manageable.

    - - - Updated - - -

    Quote Originally Posted by Easy View Post
    Problem started early this year. Same thing, yellowish/brown (really light and "whispy") sediment on bottom of pool. Clear path where it is evident water return moves water.
    Got the Taylor Kit everyone on here recommends and here are my reading:
    Chlorine = 7 ppm (this is a place 100 miles from home and we only get here on weekends....so I keep it a bit on high side)
    CC = 0
    PH = 7.6
    TA 90
    CYA 75
    Vacuumed to waste, put in DE per Pool School last night, but this morning, although you can't see it with naked eye, running the brush along bottom shows whispy clouds when pushed through water. Water still relatively clear overall. Any advice?
    you should round up your CYA, so use 80. the target FC is 6, so your not high at all.

    "relatively" clear is a bit concerning. it should be crystal clear. have you performed an overnight chlorine loss test? raise your FC to around 20ppm in the late evening, run your pumps then test right before you go to bed. retest first thing in the morning before sunrise and see what your FC loss is. if its more than 1ppm, you have living algae and need to SLAM
    Dan
    9,000 gallon in-ground Saltwater pool, plaster, cartridge filer, 1.0 hp pump, Hayward T-15 SWCG, TF-100
    Pool School - Chlorine / CYA Chart; Pool School - Test Kits Compared;

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    Re: Mustard "like" sediment in August

    Is the yellowish/brown substance mostly on the shady side of the pool? If so, then this dustlike substance may be yellow/mustard algae and requires higher chlorine levels to kill. There's a Pool School article on how to eradicate it.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
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    Re: Mustard "like" sediment in August

    I guess I should be more clear on "relatively clear" (pardon the pun). It is really clear. Not crystal as earlier in the season and it only has the slightest tinge of cloudiness because I after I vacuumed to waste yesterday I took the brush and brushed the bottom and there still was some sediment (again, "wispy" dirt)

    Pool is in total sun most of the day.

    As far as raising and checking FC loss overnight to possibly SLAM......I thought if my CC was zero I had no algae?

    - - - Updated - - -

    Also note, you can see a clear path on the bottom (little or no sediment) where the return water circulates strongest.
    24 ft round Esther Williams Aluminum Above Ground Pool, Saltrom Retro SWG, Hayward 1.5 HP Power-Flo pump, Hayward 166t 16" Sand Filter, 6 pack of Miller Lite as an accessory

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    DaninFLA's Avatar
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    Re: Mustard "like" sediment in August

    CC isn't really reliable indicator since it gets burned off pretty quick. when I did my SLAM I never registered CC, every pool is different. based on what you describe, you have an algae issue and you need to SLAM. you can confirm via the OCLT tonight. with cloudy-ish water, that's a red flag.
    Dan
    9,000 gallon in-ground Saltwater pool, plaster, cartridge filer, 1.0 hp pump, Hayward T-15 SWCG, TF-100
    Pool School - Chlorine / CYA Chart; Pool School - Test Kits Compared;

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    Re: Mustard "like" sediment in August

    OK, did OCLT and chlorine only dropped 0.6 ppm. That coupled with the zero Combined Chlorine is making me think it's not algae. Any other suggestions? It happens every year for past four years at roughly same time. Huge farm field across from me. Farmer was bailing acres of hay (tractor pulling cutter that shoots the bail into trailer....fun to watch), do you think that has anything to do with it? This morning, there were a few small dime size spots on bottom of pool which I vacuumed. Water clearer than yesterday and again most people would say clear, but not quite as crystal clear as earlier in season.
    24 ft round Esther Williams Aluminum Above Ground Pool, Saltrom Retro SWG, Hayward 1.5 HP Power-Flo pump, Hayward 166t 16" Sand Filter, 6 pack of Miller Lite as an accessory

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    Re: Mustard "like" sediment in August

    With that small of an FC loss, I would also agree it isn't algae.

    I would be curious if others think it could be from the farming. I think it's a possibility.


    Lisa P.
    26,000 IG, pebble tec, flagstone, pentair Triton II TR100 sand filter & VS+SVRS 3hp multi-speed pump, Intellichlor IC-40 SWG, Pentair Booster Cleaner, spillover spa, waterfall, Taylor K-2006 testkit
    [It is better to know how to learn, than to know. - Dr. Seuss[/I]

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    Defgufman's Avatar
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    Re: Mustard "like" sediment in August

    I'm guessing dust. Skimmer socks may help, they do for me when dust season hits. Check them often, they clog up fast.
    Inground 13,200 gal Vinyl, Pentair 3/4 hp pump, Pentair Sand Dollar filter, Polaris 280

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    DaninFLA's Avatar
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    Re: Mustard "like" sediment in August

    sounds like dust or pollen. due to it being so fine, maybe your filter is having issues pulling it out. have you tried adding DE to the filter? I would do that per the instructions, then turn off the pool overnight and vacuum first thing in the morning after it has all settled. just try and go as slow as you can to not stir it up.
    Dan
    9,000 gallon in-ground Saltwater pool, plaster, cartridge filer, 1.0 hp pump, Hayward T-15 SWCG, TF-100
    Pool School - Chlorine / CYA Chart; Pool School - Test Kits Compared;

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    Re: Mustard "like" sediment in August

    Called my Lowes and they don't carry pool DE. Pool store has 10# for $7.99. Off to go grab. Will follow instructions and update.
    Thx!

    - - - Updated - - -

    as far as skimmer socks, thought I read wear I could just use wife's panty hose. Will that do or should I break down and overpay at pool store?
    24 ft round Esther Williams Aluminum Above Ground Pool, Saltrom Retro SWG, Hayward 1.5 HP Power-Flo pump, Hayward 166t 16" Sand Filter, 6 pack of Miller Lite as an accessory

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    Re: Mustard "like" sediment in August

    I buy the queen size cheap 33 cent knee highs from walmart. I use them a few times and then trash them! I've heard of people purchasing paint strainers from Home Depot too.


    Lisa P.
    26,000 IG, pebble tec, flagstone, pentair Triton II TR100 sand filter & VS+SVRS 3hp multi-speed pump, Intellichlor IC-40 SWG, Pentair Booster Cleaner, spillover spa, waterfall, Taylor K-2006 testkit
    [It is better to know how to learn, than to know. - Dr. Seuss[/I]

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    DaninFLA's Avatar
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    Re: Mustard "like" sediment in August

    Quote Originally Posted by Pogueld View Post
    I buy the queen size cheap 33 cent knee highs from walmart. I use them a few times and then trash them! I've heard of people purchasing paint strainers from Home Depot too.


    Lisa P.
    Sent from my iPhone using Tapatalk
    not pool related...but the knee highs work great for paint strainer by the way. fantastic, high recommend next time you paint don't waste money on the ones they sell at home depot
    Dan
    9,000 gallon in-ground Saltwater pool, plaster, cartridge filer, 1.0 hp pump, Hayward T-15 SWCG, TF-100
    Pool School - Chlorine / CYA Chart; Pool School - Test Kits Compared;

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    Re: Mustard "like" sediment in August

    Quote Originally Posted by DaninFLA View Post
    not pool related...but the knee highs work great for paint strainer by the way. fantastic, high recommend next time you paint don't waste money on the ones they sell at home depot
    Good advice!


    Lisa P.
    26,000 IG, pebble tec, flagstone, pentair Triton II TR100 sand filter & VS+SVRS 3hp multi-speed pump, Intellichlor IC-40 SWG, Pentair Booster Cleaner, spillover spa, waterfall, Taylor K-2006 testkit
    [It is better to know how to learn, than to know. - Dr. Seuss[/I]

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    Re: Mustard "like" sediment in August

    Ok, not much in the knee highs. I I only added quarter cup DE (didn't move pressure up 1 psi in the two minutes---like pool school says, but thought I'd start conservative). Checked back 2 hours later and pressure rose from 16.5 to 22! Did a backwash and water was the green/yellow color for about 45 seconds. Turned back on and put in another 1/4 cup of DE. Plan to do same thing, check back in couple hours and backwash. Is this too conservative? Should I add more DE? Think this will clean up? Maybe turn off all together and let sit idle so this settles to the bottom and do another vacuum in morning? Thoughts?
    24 ft round Esther Williams Aluminum Above Ground Pool, Saltrom Retro SWG, Hayward 1.5 HP Power-Flo pump, Hayward 166t 16" Sand Filter, 6 pack of Miller Lite as an accessory

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    Richard320's Avatar
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    Re: Mustard "like" sediment in August

    I think you've found a winner. A summer's worth of pressure rise in a couple hours sounds pretty efficient. And remember that visibility is sort of logarithmic like the CYA test. The difference between the first little bit of clarity and the last is huge.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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