I just changed my pool water 2 weeks ago because the CA had reached 1000ppm. I just took a sample of the water into Leslies for testing and they reported that the CA was 200ppm but the TDS reading was 3700 whereas it should have been closer to 350! The only chemicals I added after the complete change was 2.5# CYA, along with 2 gall
of liquid Chlor and 1 gall muriatic acid. and apart from the cya the acid and CL were added in stages over that 2 week period. The suggested remedy for this was to change the water again (to what point if I use the same water supply co) or to add some chemical for around $50. Don't remember what.
Could this be for real?