27K gallon pool with slippery sides

[southjerseypool]

No I took a trip to my local pool guy. Fc is now 4.8 ph is 8.0 cya is 10.

[PoolDoc]

Ok. Then we can toss those results right out. We've encountered too many cases of completely bogus results to have any trust in those results.

Please test with the K2006 -- FC, CC, pH, & CYA at a minimum -- and report THOSE results.

[southjerseypool]

Fc 4
ph 7.4
cya 40

[PoolDoc]

. . . local pool guy. Fc is now 4.8 ph is 8.0 cya is 10.

Fc 4 ph 7.4 cya 40

And . . . that is why we NEVER trust pool store (or pool guy) results! Getting the CYA wrong by 400% is not 'close'!

OK. 5K gallon pool (15' x 3.8' water depth); PF=24. 1 gallon of PLAIN 8.25% bleach adds about 17 ppm of chlorine to your pool. (24*0.7 lbs /gal = ~17)

1. Start dosing each EVENING with 1 full gallon of plain bleach.
2. The following evening, test with OTO. If the result is clear to light yellow, add 1 more gallon. If DARK yellow, 1/2 gallon. If ORANGE, skip that dose.
3. Continue dosing in this manner for 2 days AFTER there's no trace of slipperiness or algae remaining.
4. Starting the 2nd night, BRUSH the pool completely every 2 days.
5. When you reach your final bleach dose (per #3 above), test 1 hour after dosing using the FAS DPD test. Test for BOTH FC and CC. Test AGAIN the following AM, before full sun hits the pool. Report those results here.

[southjerseypool]

Sorry my pool is 40x23 27k gallons IG with a liner....so do I do 5 gallons of bleach? Thanks for the help I hope this takes care of it..

I also have a SWCG.
.

[PoolDoc]

Ah, yes. That's why we try to keep threads to one original poster. I just jumped to the start for your gallons, and found the OPs gallons rather than yours. I should have moved your posts to their own thread, but have done so, now.

1. As you thought, instead of dosing for 5K with a PF of 20, you're dosing for 27K with a PF = ~4. Instead of 1 gallon per dose, you need 5.

2. Turn off your SWCG till this is resolved. You're just burning it out, since it can't keep up. SWCGs work best when used ONLY when the pool is functioning well. Turn them off when you're cleaning a mess.

3. Otherwise, the advice is unchanged.

[southjerseypool]

Sorry about that... I added the 5 gallons of bleach tonight I'm looking forward to a crystal clear pool again soon. Thanks again for the help.

[southjerseypool]

Hi PoolDoc,

I never Thanked you for your help. My pool is crystal clear!! Thanks again for the help, counseling & guidance. I'm so happy I never had to add algaecide!!!!

[PoolDoc]

Thanks for the thanks!

It's always nice to be able to verify that we're giving advice that works.