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Thread: HIGH CH! Understanding CSI

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    Modawg2k's Avatar
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    HIGH CH! Understanding CSI

    Hola. I only started paying attention to my water a few weeks ago. 3 y.o. pool

    Current Readings:
    FC 4.5
    pH 7.5
    TA 90
    CYA 50 (currently in the middle of raising it to 70-80)
    Ch 800 (Tap water 225), scaling present

    I've played around with the numbers in the pool calculator to see how it affects CSI. I understand that it uses "requires pH, TA, CH, CYA, Temp, uses Borate, Salt"

    With my current numbers, my CSI is 0.2.
    I'm going to set my target numbers at end of the ranges recommended:
    pH: 7.2
    TA: 60
    CYA: 80
    Borates (have not considered using this yet).

    Does that sound like a good game plan? Am I missing anything?
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Mod Squad jblizzle's Avatar
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    Re: HIGH CH! Understanding CSI

    Sounds like a plan if you are not ready to replace water. Lowering TA is easier said than done ... see the process in Pool School.
    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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    Modawg2k's Avatar
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    Re: HIGH CH! Understanding CSI

    The more I think about it, I should really drain it. Mostly because I think I need to acid wash my pool because of a staining issue during pool construction. Ill prepared rocks from my water feature stained my interior immediately upon pool startup. I still need to research acid washing before hiring someone to come do that. I may start a thread asking if my pool is indeed in need of an acid wash. Thanks for your time!
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Modawg2k's Avatar
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    Re: HIGH CH! Understanding CSI

    If I decide drain, can you guys recommend some good threads that talk about how to drain? I haven't been able to find any.

    I have a sand filter and I'm guessing backwashing isn't what I'm suppose to do for a pool drain.

    Also, how do I know if there is a certain water level that I shouldn't drop below?
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Mod Squad jblizzle's Avatar
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    Re: HIGH CH! Understanding CSI

    Well, you need to have some idea of the groundwater level around your pool. If it is below the pool, then you could likely drain the whole thing without a problem. If the groundwater is high, then if you drain too much, the pool could float itself out of the ground and basically you will have to build a new pool ... so it needs to be a serious consideration.

    Usually the drain is best done with a submersible pump, either buy a cheap one or rent one.

    What else do you want to know?
    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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    Modawg2k's Avatar
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    Re: HIGH CH! Understanding CSI

    Thanks. Where do I find out about the water level? I did a quick google search but didn't see anything.I'm pretty sure my ground doesn't have water anywhere close. There is about a 10 foot drop just past my backyard fence into an open desert preserve area.
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Mod Squad jblizzle's Avatar
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    Re: HIGH CH! Understanding CSI

    Where are you located? Add it to your profile. It sounds like you likely do not have groundwater to worry about if you are on high ground.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    Re: HIGH CH! Understanding CSI

    I'm located in Phoenix.
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Mod Squad jblizzle's Avatar
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    Re: HIGH CH! Understanding CSI

    yeah ... I don't think you have anything to worry about ... I think our ground water is measured in the 100s of feet.

    BUT, the current heat can be harsh on the plaster/pebble ... so would be best to do it at night.

    Alternatively, you could look into the Reverse Osmosis treatment that is available up there ... although I think that is in the $300-400 price range.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Re: HIGH CH! Understanding CSI

    I will have to look into the pumps. I have a pump but it takes about an hour or more to drain my 350 gallon hot tub. I'm guessing that is not the right kind if its that slow? Or is that the speed I'm looking at with draining?
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Modawg2k's Avatar
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    Re: HIGH CH! Understanding CSI

    Never mind, found pumps that do 50+ gallons per minute..... Definitely not like the one I have!
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Re: HIGH CH! Understanding CSI

    Is the recommendation to drain only a portion of the pool and then fill and retest?
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Mod Squad jblizzle's Avatar
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    Re: HIGH CH! Understanding CSI

    Depends what you are trying to accomplish. Your CYA is fine, so you have to decide how low you want to try to get the CH.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    Modawg2k's Avatar
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    Re: HIGH CH! Understanding CSI

    Well, I guess I would want to get CH down to a level that is consistent with the levels that pool school states: 250 - 350.
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Mod Squad jblizzle's Avatar
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    Re: HIGH CH! Understanding CSI

    Well, at best you can get it down to 225ppm with a complete replacement.

    A 50% change should get it down to about 500ppm.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Richard320's Avatar
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    Re: HIGH CH! Understanding CSI

    Quote Originally Posted by Modawg2k
    Well, I guess I would want to get CH down to a level that is consistent with the levels that pool school states: 250 - 350.
    Give it up. It ain't happening where you live. Your tap water is probably close to 200, if not higher, so within a couple weeks you'll be well above again, even if you drained 100%.

    There is a reverse osmosis company in the Phoenix area, you could try them. I think they're called Calsaway. They can take it down to almost nothing. Of course, they'll also remove all the CYA and alkalinity, too.
    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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    Modawg2k's Avatar
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    Re: HIGH CH! Understanding CSI

    Thanks for the info. I just got a quote from him for $545. I don't see my budget being able to handle that though. I will probably have to look into the other alternatives
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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