Hi. We've had our pool for about a year. Over the last few weeks we started getting brown stains. After testing with Vitamin C, we knew it needed an ascorbic acid treatment which worked perfectly (on 7/5). We followed it with a chelator the next day.
Today we tested the water and here are our results. What do we need to do next?
Pool is 8000 gallon free-form, gunite, has a SWG and sand filter.
Ascorbic Acid treatment on 7/5
Tested water 7/7
Total Hardness 150ppm
CYA: under 30 (that's the lowest our test would read)
This is our stain before, gone now.
And, what are these white spots? They were there after the initial plaster job, then we had it acid washed in the spring and they were gone...and now they are back. The bottom of the pool is streaky with them, too.
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