Long time reader, first time poster....
20x40 rectangular vinyl pool with sand filter and chlorinator (tablets). Just got my TF-100 test kit in today and tested for the first time.
I had already dumped $300 of stuff into the pool since mid April. Got tired of getting no where, so I turned off the pump and waited till my testing kit came in. I have 40 gallons of HTH that I got at the ACE sale over the weekend, did not want to throw that into the pool until my kit came.
I have dredged the bottom as best I could, but cannot see the bottom. Closest I got just guessing, I could see a faint white circle which was the fountain in the shallow end. Never could see the bottom.. After 5 days of waiting, it is totally back to green. Post pictures later.
With a PH of 7.2 and a CYA of 40, I am guessing 335K of water so I have a shock level of 16. I have a free weekend this weekend so I am going to start tomorrow night with the slam. I can at least get up in the night to keep the shock level up. Without the kit, I did not know how much to add, so I was wasting it.
I have half a box of borax, should I dump it in to raise PH a little more? I know 7.2 is good, but 7.5 would be perfect.
I will post pictures as I can so others can see the progress.
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Current picture. I have swept and vacuumed the steps.