Pool Still Green After 2+ Weeks

madlakespool

New member
Aug 22, 2019
2
Anderson, IN
Good morning all!

For reference, I have a 27000 gal IG Concrete pool with a Triton II Sand Filter and Pentair CHII N1 Self Priming Pump (10+ years old). The main drain doesn't work.

About 2.5 weeks ago, the water started turning green. I jumped on here to get some advice/info and started following the SLAM process. Unfortunately it is not working. I have tried shocking, clarifier, algaecide on top of vacuuming daily, using the broom, backwashing, etc. and nothing is clearing the water.

My readings are
TC: 6.0
CC: 5.0
Alkalinity: 140
CYA: 90
pH: 7.6

Any advice is welcome at this point.
 

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jimbethesda

Gold Supporter
Jul 2, 2018
224
Austin, TX
What test kit are you using? I noticed you reported Total Chlorine and combined chlorine. If those numbers are correct, your free chlorine is only 1. Well below slam level and also below the recommended minimum.
 

jimbethesda

Gold Supporter
Jul 2, 2018
224
Austin, TX
Since you already have a test kit, you just need to add one of these:


I also recommend getting the speedstir, it makes all your testing easier: