Hi, we are new members to the forum and hope you can help us out please.
We've read the Pool School, but unfortunately it's not answering our problem, at present.
We have a 12m x 6m inground pool which my husband has maintained for the last 6 years relatively trouble free. About a month ago we had the pool relined with a new vinyl liner and filled with new water. However, the problem he is having is the pH is remaining constantly high and the TA is off the scale! Our test kit measures TA upto 240ppm and is green colour, however test strip is showing a blue colour which is above and beyond 240ppm (we assume). At least 25kg of Sodium Bisulphate (diluted with water) has gone into the pool over a period of 10 days but the readings are remaining the same each time:
TA: 240 +
CH: don't know
The TA will just not move. The water is looking crystal clear though.
Any suggestions would be most appreciated. Thanks.