Please Help With Pool Water

by Dac Nguyen
(Richardson TX)

18000 Gals Clorine pool-irregular shape outdoor pool

White plaster
TX summer heat is about 95 deg
Reading from Leslie's pool:
FAC: 2
TAC: 2
CH: 210
CYA: 30
TA: 60
pH: 7
Base: 11
TDS: 900
Phosphates: 750

In addition I've just dump about 2.5 jugs (121 oz bottle) of 8.25% clorox bleach along with 6 lbs of soda ash yesterday...pump runs 24 hrs

Water is still light green. Please help me, I'm new the pool business.

Thanks for the question

First thing is to get a good test kit. The Taylor K-2006 is the best and will give you the most accurate readings. I've made several detailed videos on YouTube on how to use it.

Your readings seems to be alright. The CYA is just a bit high at 60ppm. The normal range is 30 - 50ppm. You can have 60ppm but you'll need to run the FC a bit higher than the normal range of 2 - 4ppm. Once you get the pool cleared up you'll want to maintain the FC between 4 - 6ppm. At some point in the near future you'll want to do a 1/3 drain and refill to reduce the CYA to the proper range.

The first thing to do is to be sure your filter is working perfectly. The kind of filter wasn't given but regardless, it needs to be working. Be sure the skimmer and pump baskets are cleaned out. Vacuum the bottom as best you can.

Next is to use 2 - 2.5 gallons of liquid chlorine and maintain a FC level of 12 - 13ppm. This will kill the algae but you must maintain the FC level.
You did right in using bleach but you must maintain the FC level. Sweep the walls after to chlorinate to keep the algae suspended and mix up the chlorine. Stop using anything that will increase the pH. You want it at 7.0 - 7.2 for now. Chlorine works better at a lower pH. It will eventually come up due to splashing around, or you can add some soda ash later on but for now leave it alone.

Backwash/clean filter once per day. Once you lose only 2ppm of FC between applications you'll know the algae is dead. Only at this time should you use a clarifier.

Shocking is a process, not an event. It's something you do, not something you buy. The trick is to get AND keep the chlorine above 10 - 12ppm for a period of time. You'll need to manually dose the pool with chlorine to keep it at 10 - 12ppm. Make the adjustment at night, then retest in the morning. Be sure to have the pump running 24/7 and backwash once per day. You can go up to 15ppm, but no higher. Anything after that and you're wasting money and chemicals.

If you feel your situation is more complex than this, I do phone consultations. It makes things go much faster and many people have found it extremely beneficial, saving them time and money in the long run. All your questions will be answered. I have nothing to sell you so you know I'm not bias.

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Hope this helps and have a great Summer.


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