Green Algae

[lynn2_cal]

Thanks,

yes I do have a SWG. Should I wait to drain 1/2 as a last resort? Will it hurt anything with the chlorine up at 25 to turn off the pump if I drain?

[duraleigh]

Thanks,

yes I do have a SWG. Should I wait to drain 1/2 as a last resort? Will it hurt anything with the chlorine up at 25 to turn off the pump if I drain?

Hi, Lynn, Yeah, that changes somes things...I should've asked you that first. Yes, drain as a last resort.

Leave your CYA up there at 100...it's alittle high for SWG, but it'll dilute with rain and refill.

Still shock the pool as in the earlier post. That'll clear your water, get rid of the CC's and not put a strain on your SWG by asking it to do it. (They're not really good at shocking.....particualrly those high levels.)

Still can't comment on the phosphates...I have no experience

[lynn2_cal]

Thanks again duraleigh,

I tested again and chlorine was down to 18, added 1 1/2 gallons bleach per bleach calc. to get up to 30.

I'm not worried about the phosphates now either. They were way down after adding the PhosFree.

[lynn2_cal]

Other questions, do I need to keep the chlorine up around 25-30 for a week? I'm not seeing any algae this morning, it's been 2 days now with pump running 24/7.

Again, how do you know algae is dead?

Can I run my navigator in water with that high of chlorine?

[duraleigh]

Lynn,

Reduce your Cl back when you can hold FC overnite.

Test in the evening, bring up to 30, test before the sun hits it in the AM.
Unless, your AM reading is, say, 28 or better, your still consuming organics in your pool.

That's your guideline to drop back to the 2-4ppm that your SWG probably recommends .

I leave my auto-vac in the pool most of the time...including shock levels. No harm so far, but mine's not a navigator.

[lynn2_cal]

Thanks for the quick answers
With a CYA of 100, don't I need to keep my chlorine levels higher?

[duraleigh]

With a CYA of 100, don't I need to keep my chlorine levels higher?

You'll need to get that info from the SWG manufacturer. I know they are quite comfortable with maintenance Cl levels much lower than with ordinary chlorination.