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Thread: I've asked this before, please don't stone me... sand level?

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    I've asked this before, please don't stone me... sand level?

    I asked this 2-3 years ago and got replies from helpful people but didn't get any helpful replies.

    To recap regarding my setup.... used pool, bought from a 'pool guy' close to 5 years ago. The sand filter was painted with a textured paint and there's no labels left to view. It looks identical to a Pentair Sand Dollar filter. The label on the pump doesn't match anything anywhere. I posted pics of the pump and filter years ago along with the label and no one could determine what exactly it is that I have.

    This is my first pool. And at the time of buying it and then given about 1 minute of instructions on how to backwash the filter, I didn't know what else to ask at the time. Nor did I think to ask for any details about the filter and pump. I can no longer get ahold of the 'pool guy'.

    First 3 years, everything was great. Last season and even worse this season, the filter is just doing practically nothing... meaning not cleaning well. While vacuuming the bottom, the suction drops too low to 'suck' after about 5 minutes. I then backwash.... I can backwash for 30 seconds, or 5 minutes, and when done backwashing, I get about 5 minutes of suction until it stops again.

    So... I take the head off the filter... first time ever... thus my question again (in a minute). I first though removed the drain plug. No water came out. After taking the head off, the filter was full of water. I got my shop vac and started vacuuming, with the hose about 6 inches in the filter. Only water is in the canister when I dump, not a single grain of sand. I do this again, and again and again (very small vac). I get about half the water out and I have the vacuum hose about 2 feet or more in the filter. Vac is full..... I dump it.... only water. Still not a grain of sand to be found anywhere. I keep doing this until I get about 3/4 of the filter empty before I start hitting sand.

    So now, I have all the sand out. I have not purchased sand often but have somewhat of a faint idea of how much sand would be in a 50# bag. I would be very surprised if I removed more than about 70# of sand... and that is being VERY kind.

    I have not experienced any sand in the pool in the few short years we have had it.

    I did not see the guy fill up the filter. And from the care during the installation and operation of the pool for the first 2-3 years, I have no reason to doubt he did not fill it up correctly.

    Can that much sand come out during backwashing?

    Since I don't know exactly how much sand the owner's manual says to use.... how far below the center pipe should I fill the sand to?

    Also, I'm using zeosand/zeolite.... forgot the name of it. I know it doesn't take as much as regular pool sand. But does that mean that volume wise it uses less but looks the same? Or do I fill it even less full compared to the center pipe?

    Hope this questions make sense.

    Thank you.
    24' x 52" AGP = 13.5k gallons
    Dynamo 2.0 HP pump,Sand Dollar sand filter
    Polaris 65 vacuum (good when there are a ton of leaves on bottom), Pool Rover Jr. (LOVE it, but power box dead right now), AquaCritter (an excellent suction side cleaner)

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    Mod Squad Bama Rambler's Avatar
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    Re: I've asked this before, please don't stone me... sand le

    Unfortunately I can't help since you use zeo. If it were sand, and you have a SD-60 or SD-80 you leave about 10" of freeboard from the neck of the vessel.

    You say no one could identify the pump and filter yet you have the 2 hp Dynamo Pump and the Sand Dollar filter listed in your sig. If you'll post pics of them again we may be able to identify them now.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: I've asked this before, please don't stone me... sand le

    Quote Originally Posted by Bama Rambler
    Unfortunately I can't help since you use zeo. If it were sand, and you have a SD-60 or SD-80 you leave about 10" of freeboard from the neck of the vessel.

    You say no one could identify the pump and filter yet you have the 2 hp Dynamo Pump and the Sand Dollar filter listed in your sig. If you'll post pics of them again we may be able to identify them now.
    I listed it as the that combination due to being told that is the closest thing it looks like.

    I'll look and see if I can find the old pics.... or else take new ones.

    Any thought on why so little sand was in the filter? Can that much come out in close to 4 years of back washing? I would think it was at the appropriate level since it did filter appropriately during the first 3 years.
    24' x 52" AGP = 13.5k gallons
    Dynamo 2.0 HP pump,Sand Dollar sand filter
    Polaris 65 vacuum (good when there are a ton of leaves on bottom), Pool Rover Jr. (LOVE it, but power box dead right now), AquaCritter (an excellent suction side cleaner)

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    Re: I've asked this before, please don't stone me... sand le

    24' x 52" AGP = 13.5k gallons
    Dynamo 2.0 HP pump,Sand Dollar sand filter
    Polaris 65 vacuum (good when there are a ton of leaves on bottom), Pool Rover Jr. (LOVE it, but power box dead right now), AquaCritter (an excellent suction side cleaner)

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    Re: I've asked this before, please don't stone me... sand le

    I don't know why I haven't done this before... but I just measured the circumference of the filter using something to wrap around the body of the filter in the middle and then measuring that with a regular retractable measuring tape... and it's 71". The biggest Sand Dollar filter.. the SD60 says the diameter is 22"... where are they measuring that?



    EDIT: I forgot about calculating diameter from circumference So my filter is 22" in diameter.. which matches up to the SD60.
    24' x 52" AGP = 13.5k gallons
    Dynamo 2.0 HP pump,Sand Dollar sand filter
    Polaris 65 vacuum (good when there are a ton of leaves on bottom), Pool Rover Jr. (LOVE it, but power box dead right now), AquaCritter (an excellent suction side cleaner)

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    Mod Squad Bama Rambler's Avatar
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    Re: I've asked this before, please don't stone me... sand le

    I don't know why you're in doubt about the pump size it says 2 hp right on it.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: I've asked this before, please don't stone me... sand le

    Quote Originally Posted by Bama Rambler
    I don't know why you're in doubt about the pump size it says 2 hp right on it.
    Yes, I know the HP... but I wasn't asking what the HP was. In my thread from 4 years ago I was trying to figure out if my pump and filter came as a combo.... because since all identifying marks are painted over on the filter, I was hoping that numbers from the pump could be used to see if this was a combo and thus be able to find a manual.

    But I'm not concerned with the HP of my pump, only how high the sand level is supposed to be (which you have answered and not sure since it's zeosand, thank you), as I wasn't for sure of the filter size.

    I didn't think of the obvious until earlier today to measure the filter and then check Pentair's website to see how much sand it's supposed to hold all together.

    Thank you for your time.

    I'm hoping all I need to know is that you use half the amount of zeosand, so I used 125# instead of 250# of sand.
    24' x 52" AGP = 13.5k gallons
    Dynamo 2.0 HP pump,Sand Dollar sand filter
    Polaris 65 vacuum (good when there are a ton of leaves on bottom), Pool Rover Jr. (LOVE it, but power box dead right now), AquaCritter (an excellent suction side cleaner)

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