First of all, let me say how very much I appreciate ALL of the information from this site and forum. Over the past couple of weeks I've gone from being completely clueless about how to manage our 16X48 5,000 gallon AG Intex Vinyl pool to draining (sky-high CYA), slamming and having a crystal clear pool! YAY!
But, I'm still in the testing (with my new Taylor K-2006 kit) every day mode as I continue to sort it all out.
When I refilled the pool, the PH level right out of the tap was sky high. In fact, I went and purchased the chemicals to lower my PH. But, by the time I got back from the store and retested to find out how much to add, the water had already settled down enough that the PH was dropping. By the next morning, the PH was in the 7.8 range. So, I returned those chemicals.
Today I tested and my PH was LOW. It registered lighter than the bottom color on the test kit. So, I plugged in "7" into the pool math calculator and added the suggested amount of 13 oz. (by volume) of Soda Ash to raise my PH to 7.5. I was trying to be "reasonable". Several hours later though and the PH is testing a bright shade of hot pink! It is not even on the chart.
So, I'm trying to figure out what I did wrong. I thought I was following the "rules"! My TA was low as well when I added the Soda Ash (60 ppm). It is now at 80 ppm. My other levels are as follows:
(Haven't tested for combined chlorine in a couple of days. It was 0 a few days ago)
Thanks for any thoughts you may have. I will definitely add about half the recommended dose from now on. I really hate to go to the pool store and re-purchase the chemicals to lower the PH...