Can't Get Clear (Have PS233 Results)

[Watermom]

aswetich:
Just a comment. FC + CC = TC.

Watermom

[aswetich]

Ok,
One person says to keep the CL (Is this TC?) at 20 ppm and one says don't go below 3.5 FC. I am assuming they say the same thing so I will ask the question I have related to the bleach calculator. The bleach calculator has a ppm increase field but I don't know how to calculate what my existing ppm is. Can you tell me how to use my numbers above to figure out the current ppm so I can enter the ppm increase in the ppm calculator ?

Thanks

[mwsmith2]

You don't calculate what your existing PPM is, you measure it with a test kit. Measure the FC with the DPD-FAS test. If you want to get to 20 ppm Cl, and your test results are 3.5, then 20 - 3.5 = 16.5. Put that number in the ppm increase field and hit calculate. You'll be shown how much bleach to add.

Michael

[aswetich]

That is what I calculated but I assumed I did something wrong. My 32K pool will require 8 Gallons of 6% to get to 20 ppm. With the readings I displayed above does 8 gallons seem correct ? What number do I want to use to keep at 20 ppm ? FC, CC, or TC ?


Thanks

[mwsmith2]

If you are currently at 5 ppm, then yes, 8 gallons of 6% bleach will take you to 20 ppm. However, if you have 3.5 ppm right now, you are going to need 8.8 gallons, or 8 Gallon(s), 3 quart(s), 0 cup(s) and 6 ounce(s).

For sanitation/algae killing the number that does the work (the one you want to use) is FC.

[aswetich]

OK,
This is all starting to make sense. So after I get everything all cleared up I should keep my FC level around 5 due to the 60 CYA ? (Any span or just right at 5 give or take?) If I keep my FC at 5 won't the standard two tube tester show the clorine level off the chart ? (Bright Yellow) If it is off the chart wont it irratate the eye, Etc ? Having you guys to talk to is helping a lot !!! Thanks

[mwsmith2]

Yes, keep it at right around 5 to be problem-free.

No, you won't get any eye irritation.

Yes, it will look like it's off the chart. That's why you need a DPD-FAS Cl test, much like the one that's included in Ben's test kit. Actually, the PS234 is the best deal out there, I highly suggest it.

Michael

[aswetich]

Last night about 9:00PM I added the amount of bleach the calculator said to bring the FC up to 20 ppm. Just checked the FC at 10:00AM this morning and it is 20.5 ppm. It is a bit clearer but still has a long way to go. How long should I keep the FC at 20 before I let it drop down to the 5 ppm recomendation for my 60 CYA ? How long should it take to clear up ?

Thanks

[duraleigh]

Run your pump 24/7 'til your pool looks good to you. Keep your Cl at 20ppm for the same length of time.

Can't tell you how long that will take...usually a dramatic inprovement in 24-48 hours.....depends on a lot of factors.

Can you test for CC?