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Thread: How many salt cells do I need

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    How many salt cells do I need

    Hey All,

    I am new to this site and in the process of constructing our pool. I intend to install (already purchased) a Hayward Aqua Plus with 40k salt cell. I will have ~ 38k gal. I believe I can turn the entire pool over in ~ 8 hours. My question is will this one cell be enough to handle the entire pool only running for 8 hours per day, or do I need to install additional cells? Any advice would be much apperciated.

    Thanks,

    Rick
    18X39X32 T-Shaped vinyl liner IG pool, deep end is 8ft....Metal walls... Hayward Ecostar, AQL-Plus Salt, 30" sand filter...completed July 1, 2016!!

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    Mod Squad jblizzle's Avatar
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    Re: How many salt cells do I need

    Welcome to TFP!!!

    We recommend sizing the SWG for 1.5-3 times the size of your pool. I do not think that 40k SWG will produce enough FC for you in 8 hours. BTW, there is no reason to worry about turn-over. See: Determine Pump Run Time

    You might want to look at some of the bigger SWGs like Autopilot, Circupool (although there is some question about the quality here recently), or Pentair.

    Oh shoot, I see you have Hayward AQL-Plus already. Well, you can try with just the one 40k cell, but it may not keep up in the middle of summer without longer run times or bleach supplement. You can always add another one later.
    Jason, TFP Moderator
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    Re: How many salt cells do I need

    Thank you! Are there instructions on here somewhere that talk about installing two SWGs? I apperciate your help and time in advance.
    18X39X32 T-Shaped vinyl liner IG pool, deep end is 8ft....Metal walls... Hayward Ecostar, AQL-Plus Salt, 30" sand filter...completed July 1, 2016!!

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    Mod Squad jblizzle's Avatar
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    Re: How many salt cells do I need

    No instructions. I think AQL-plus can somehow be hooked up to control 2 SWG, you still need the control box for the 2nd one, but I think it becomes a slave to the automation system. This might be covered in the manuals.

    I think ideally you want to put the SWG cells in series so that your flow rate requirements do not go up.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: How many salt cells do I need

    Instead of buying an expensive second cell and power supply, you would probably do better just running longer since you have a VSP. At low speed, the power required is pretty low.

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    Mod Squad jblizzle's Avatar
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    Re: How many salt cells do I need

    Quote Originally Posted by JamesW View Post
    Instead of buying an expensive second cell and power supply, you would probably do better just running longer since you have a VSP. At low speed, the power required is pretty low.
    Agreed. I would certainly wait at least a year and see how the single one works before adding a 2nd one.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: How many salt cells do I need

    If it's not too late, you might want to consider a large cartridge filter instead of a sand filter. A cartridge filter has less resistance to flow than a sand filter. That means that you can run at lower rpm for the same flow rate. Lower rpm means less power and lower cost to run.

    In fact, head loss will probably be so low that the needle on the pressure gauge might not even move.

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    Mod Squad pooldv's Avatar
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    Re: How many salt cells do I need

    True, I run my Intelliflo at 1100 rpm for skimming and making chlorine, it uses 150 watts and the pressure gauge on the cartridge filter is 0. At 10.25c/kWh I can run my pump 24x7 for less than 12 bucks a month.
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    Re: How many salt cells do I need

    Thanks for the advice!
    18X39X32 T-Shaped vinyl liner IG pool, deep end is 8ft....Metal walls... Hayward Ecostar, AQL-Plus Salt, 30" sand filter...completed July 1, 2016!!

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    Re: How many salt cells do I need

    Just to let you know, the AquaRite can add about 4.5 ppm of FC in your pool in 24 hours if the output is set to 100%. Each pool is different on how much chlorine it uses, but it is not uncommon to need around 4 ppm of chlorine during the summer.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
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