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    waterbear's Avatar
    waterbear is offline Lifetime Member Sniggle Mechanic waterbear 4 stars waterbear 4 stars waterbear 4 stars waterbear 4 stars
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    Default Re: cya low, alk a little high, ph keeps rising

    Quote Originally Posted by hkcon View Post
    2. is 130 really high for alk?
    4. my ph will not stay down at 7.5 or .6 it goes up every day.
    IF your pH is constantly rising then your Alk is too high (assuming you are using bleach, liquid chloirne, cal hypo or a SWCG and not trichlor, dichlor or MPS--non chlorne shock) Dropping the ALK down to 80 ppm or even a bit lower willl slow the pH rise from outgassing of CO2 which is the main cause of pH rise in a pool using unstabilized chlorine. However, if your poos is plaster and it is new then the pH will also be rising from the curing plaster. Also, if your pool is plaster you might have to adjust the calcium hardness to keep the water balanced if your drop the TA. Without more info I can't say more.
    Quote Originally Posted by hkcon View Post
    3. is 300 high for phosphates?
    no, ignore phospahtes. Mine are over 3000 ppm and I have NO problems. They are just a money making scam for the pool stores. Before there were products they could sell you to remove phosphates no one ever tested for them. Nitrates are as big of a 'problem" (not) and they are not routinely tested because there is no product they can sell you to lower nitrates, you have to change water to dillute them.
    Retired pool store and commercial pool maintenance guy.

  2. #2
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    Default Re: cya low, alk a little high, ph keeps rising

    ok ty guys, 26,000 gallon plaster pool 17 yrs old, cartridge filter (4 tall ones), 3/4 horse pump, solar, heater, spa (connected w/ spillover to pool), secondary pump for cleaner.
    I use liquid chlorine (sodium hydrochlorite 10%), when I had zero cya the store wanted me to use 3 gallons of the liquid so I will put in the one gallon I have with the 1/2 lb of dry and see where I am. I will probably not try to lower the alkalinity unless I see that it is rising. I thought that you might say that about the phosphates, actually I was hoping...it is good to have you confirm that. I do not think it is pollen, I have nothing around the top, and it looks just like yellow algae, which I am very experienced at growing...LOL It has only happened twice and i brush it and it is gone, it happens on the afternoon sunny side of the pool.

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